| thalamocortical | (adjective) relating to or connecting the cortex and thalamus | - |
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| thalamus | (noun) large egg-shaped structures of grey matter that form the dorsal subdivision of the diencephalon | - |
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| thalassaemia | (noun) an inherited form of anemia caused by faulty synthesis of hemoglobin | Synonyms: Mediterranean anaemia, Mediterranean anemia, thalassemia |
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| thalassemia | (noun) an inherited form of anemia caused by faulty synthesis of hemoglobin | Synonyms: Mediterranean anaemia, Mediterranean anemia, thalassaemia |
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| thalassic | (adjective) relating to the seas, especially smaller or inland seas | - |
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| thalidomide | (noun) a sedative and hypnotic drug; withdrawn from sale after discovered to cause severe birth defects because it inhibits angiogenesis | - |
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| thallium | (noun) a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores | Synonyms: atomic number 81, Tl |
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| thalloid | (adjective) of or relating to or resembling or consisting of a thallus | - |
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| thallophyte | (noun) any of a group of cryptogamic organisms consisting principally of a thallus and thus showing no differentiation into stem and root and leaf | - |
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| thallophytic | (adjective) pertaining to or characteristic of thallophytes | - |
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| thallus | (noun) a plant body without true stems or roots or leaves or vascular system; characteristic of the thallophytes | - |
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| thalmencephalon | (noun) the posterior division of the forebrain; connects the cerebral hemispheres with the mesencephalon | Synonyms: betweenbrain, diencephalon, interbrain |
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| thalweg | (noun) a line following the lowest points of a valley | - |
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| (noun) the middle of the chief navigable channel of a waterway that forms the boundary line between states | - |
| thanatology | (noun) the branch of science that studies death (especially its social and psychological aspects) | - |
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| thanatophobia | (noun) a morbid fear of death | - |
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| thanatopsis | (noun) an essay expressing a view on the subject of death | - |
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| thane | (noun) a man ranking above an ordinary freeman and below a noble in Anglo-Saxon England (especially one who gave military service in exchange for land) | - |
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| (noun) a feudal lord or baron | - |
| thaneship | (noun) the position of thane | - |
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| thank | (verb) express gratitude or show appreciation to | Synonyms: give thanks |
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| thankful | (adjective) feeling or showing gratitude | Synonyms: grateful |
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| thankfully | (adverb) let us be thankful that | - |
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| (adverb) in a thankful manner; with thanks | Synonyms: gratefully |
| thankfulness | (noun) warm friendly feelings of gratitude | Synonyms: appreciativeness, gratefulness |
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| thankless | (adjective) not feeling or showing gratitude | Synonyms: ungrateful, unthankful |
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| (adjective) not likely to be rewarded | Synonyms: unappreciated, ungratifying |
| thanks | (noun) with the help of or owing to | - |
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| (noun) an acknowledgment of appreciation | - |
| thanksgiving | (noun) a short prayer of thanks before a meal | Synonyms: blessing, grace |
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| thatch | (noun) a house roof made with a plant material (as straw) | Synonyms: thatched roof |
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| (noun) hair resembling thatched roofing material | - |
| (noun) plant stalks used as roofing material | - |
| (verb) cover with thatch | - |
| thatcher | (noun) someone skilled in making a roof from plant stalks or foliage | - |
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| thaumatolatry | (noun) the worship of miracles | Synonyms: miracle-worship |
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| thaumaturge | (noun) one who practices magic or sorcery | Synonyms: magician, necromancer, sorcerer, thaumaturgist, wizard |
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| thaumaturgist | (noun) one who practices magic or sorcery | Synonyms: magician, necromancer, sorcerer, thaumaturge, wizard |
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| thaumaturgy | (noun) an illusory feat; considered magical by naive observers | Synonyms: conjuration, conjuring trick, deception, illusion, legerdemain, magic, magic trick, trick |
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| (noun) any art that invokes supernatural powers | Synonyms: magic |
| thaw | (noun) a relaxation or slackening of tensions or reserve; becoming less hostile | - |
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| (noun) warm weather following a freeze; snow and ice melt | Synonyms: thawing, warming |
| (noun) the process whereby heat changes something from a solid to a liquid | Synonyms: melt, melting, thawing |
| (verb) become or cause to become soft or liquid | Synonyms: dethaw, dissolve, melt, unfreeze, unthaw |
| thawed | (adjective) no longer frozen solid | - |
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| (adjective) no longer frozen | - |
| thawing | (noun) warm weather following a freeze; snow and ice melt | Synonyms: thaw, warming |
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| (noun) the process whereby heat changes something from a solid to a liquid | Synonyms: melt, melting, thaw |
| theanthropism | (noun) (theology) the doctrine that Jesus was a union of the human and the divine | - |
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| (noun) the representation of objects (especially a god) as having human form or traits | Synonyms: anthropomorphism |
| theater | (noun) a building where theatrical performances or motion-picture shows can be presented | Synonyms: house, theatre |
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| (noun) the art of writing and producing plays | Synonyms: dramatic art, dramatics, dramaturgy, theatre |
| (noun) a region in which active military operations are in progress | Synonyms: field, field of operations, theater of operations, theatre, theatre of operations |
| theatergoer | (noun) someone who attends the theater | Synonyms: playgoer, theatregoer |
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| theatre | (noun) a building where theatrical performances or motion-picture shows can be presented | Synonyms: house, theater |
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| (noun) the art of writing and producing plays | Synonyms: dramatic art, dramatics, dramaturgy, theater |
| (noun) a region in which active military operations are in progress | Synonyms: field, field of operations, theater, theater of operations, theatre of operations |
| theatregoer | (noun) someone who attends the theater | Synonyms: playgoer, theatergoer |
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| theatrical | (adjective) suited to or characteristic of the stage or theater | - |
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| (adjective) of or relating to the theater | - |
| (noun) a performance of a play | Synonyms: histrionics, representation, theatrical performance |
| theatricality | (noun) an artificial and mannered quality | Synonyms: staginess |
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| theatrically | (adverb) in a stagy and theatrical manner | Synonyms: stagily |
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| (adverb) in a theatrical manner | - |
| theatrology | (noun) the study of theatrical performance in relation to its literary, physical, psycho-biological, sociological, and historical contexts. | Synonyms: theatre studies |
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| thebe | (noun) 100 thebe equal 1 pula in Botswana | - |
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| theca | (noun) outer sheath of the pupa of certain insects | - |
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| (noun) a case or sheath especially a pollen sac or moss capsule | Synonyms: sac |
| thecodont | (noun) presumably in the common ancestral line to dinosaurs and crocodiles and birds | Synonyms: thecodont reptile |
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| theelin | (noun) a naturally occurring weak estrogenic hormone secreted by the mammalian ovary; synthesized (trade name Estronol) and used to treat estrogen deficiency | Synonyms: estrone, Estronol, oestrone |
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| theft | (noun) the act of taking something from someone unlawfully | Synonyms: larceny, stealing, thievery, thieving |
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| theine | (noun) caffeine when present in tea. | - |
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| theism | (noun) the doctrine or belief in the existence of a God or gods | - |
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| theist | (adjective) of or relating to theism | Synonyms: theistic, theistical |
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| (noun) one who believes in the existence of a god or gods | - |
| theistic | (adjective) of or relating to theism | Synonyms: theist, theistical |
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| theistical | (adjective) of or relating to theism | Synonyms: theist, theistic |
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| thelarche | (noun) the start of breast development in a woman at the beginning of puberty | - |
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| thematic | (adjective) relating to or constituting a topic of discourse | - |
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| (adjective) of or relating to a melodic subject | - |
| thematically | (adverb) with regard to thematic content | - |
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| theme | (noun) a unifying idea that is a recurrent element in literary or artistic work | Synonyms: motif |
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| (noun) the subject matter of a conversation or discussion | Synonyms: subject, topic |
| (noun) an essay (especially one written as an assignment) | Synonyms: composition, paper, report |
| (noun) (music) melodic subject of a musical composition | Synonyms: idea, melodic theme, musical theme |
| (noun) (linguistics) the form of a word after all affixes are removed | Synonyms: base, radical, root, root word, stem |
| (verb) provide with a particular theme or motive | - |
| then | (adjective) at a specific prior time | - |
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| (noun) that time; that moment | - |
| (adverb) subsequently or soon afterward (often used as sentence connectors) | Synonyms: and so, so |
| (adverb) at that time | - |
| (adverb) in that case or as a consequence | - |
| thenal | (adjective) of or relating to the palm of the hand or to the area at the base of the thumb | Synonyms: thenar |
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| thenar | (adjective) of or relating to the palm of the hand or to the area at the base of the thumb | Synonyms: thenal |
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| (noun) the inner surface of the hand from the wrist to the base of the fingers | Synonyms: palm |
| (noun) the fleshy area of the palm at the base of the thumb | - |
| thence | (adverb) (used to introduce a logical conclusion) from that fact or reason or as a result | Synonyms: hence, so, therefore, thus |
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| (adverb) from that place or from there | Synonyms: therefrom |
| (adverb) from that circumstance or source | Synonyms: therefrom, thereof |
| thenceforth | (adverb) from that time on | Synonyms: thereafter |
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| theocentrism | (noun) the belief that God is the central aspect to our existence. | - |
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| theocracy | (noun) the belief in government by divine guidance | - |
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| (noun) a political unit governed by a deity (or by officials thought to be divinely guided) | - |
| theocratic | (adjective) of or relating to or being a theocracy | - |
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| theodicy | (noun) the branch of theology that defends God's goodness and justice in the face of the existence of evil | - |
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| theodolite | (noun) a surveying instrument for measuring horizontal and vertical angles, consisting of a small telescope mounted on a tripod | Synonyms: transit |
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| theogony | (noun) the study of the origins and genealogy of the gods | - |
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| theologian | (noun) someone who is learned in theology or who speculates about theology | Synonyms: theologiser, theologist, theologizer |
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| theological | (adjective) of or relating to or concerning theology | - |
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| theologically | (adverb) in a theological manner | - |
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| (adverb) as regards theology | - |
| theologise | (verb) make theoretical speculations about theology or discuss theological subjects | Synonyms: theologize |
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| (verb) treat from a theological viewpoint or render theological in character | Synonyms: theologize |
| theologiser | (noun) someone who is learned in theology or who speculates about theology | Synonyms: theologian, theologist, theologizer |
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| theologist | (noun) someone who is learned in theology or who speculates about theology | Synonyms: theologian, theologiser, theologizer |
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| theologize | (verb) make theoretical speculations about theology or discuss theological subjects | Synonyms: theologise |
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| (verb) treat from a theological viewpoint or render theological in character | Synonyms: theologise |
| theologizer | (noun) someone who is learned in theology or who speculates about theology | Synonyms: theologian, theologiser, theologist |
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| theology | (noun) the learned profession acquired by specialized courses in religion (usually taught at a college or seminary) | - |
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| (noun) a particular system or school of religious beliefs and teachings | Synonyms: theological system |
| (noun) the rational and systematic study of religion and its influences and of the nature of religious truth | Synonyms: divinity |
| theophany | (noun) a visible (but not necessarily material) manifestation of a deity to a human person | - |
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| theophylline | (noun) a colorless crystalline alkaloid derived from tea leaves or made synthetically; used in medicine as a bronchial dilator | Synonyms: Elixophyllin, Slo-Bid, Theobid |
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| theorem | (noun) an idea accepted as a demonstrable truth | - |
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| (noun) a proposition deducible from basic postulates | - |
| theoretic | (adjective) concerned primarily with theories or hypotheses rather than practical considerations | Synonyms: theoretical |
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| theoretical | (adjective) concerned primarily with theories or hypotheses rather than practical considerations | Synonyms: theoretic |
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| (adjective) concerned with theories rather than their practical applications | - |
| theoretically | (adverb) in theory; according to the assumed facts | Synonyms: on paper |
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| (adverb) in a theoretical manner | - |
| theoretician | (noun) someone who theorizes (especially in science or art) | Synonyms: idealogue, theoriser, theorist, theorizer |
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| theorisation | (noun) the production or use of theories | Synonyms: theorization |
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| theorise | (verb) to believe especially on uncertain or tentative grounds | Synonyms: conjecture, hypothecate, hypothesise, hypothesize, speculate, suppose, theorize |
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| theoriser | (noun) someone who theorizes (especially in science or art) | Synonyms: idealogue, theoretician, theorist, theorizer |
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| theorist | (noun) someone who theorizes (especially in science or art) | Synonyms: idealogue, theoretician, theoriser, theorizer |
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| theorization | (noun) the production or use of theories | Synonyms: theorisation |
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| theorize | (verb) to believe especially on uncertain or tentative grounds | Synonyms: conjecture, hypothecate, hypothesise, hypothesize, speculate, suppose, theorise |
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| (verb) form or construct theories | - |
| (verb) construct a theory about | - |
| theorizer | (noun) someone who theorizes (especially in science or art) | Synonyms: idealogue, theoretician, theoriser, theorist |
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| theory | (noun) a well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena | - |
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| (noun) a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena | Synonyms: hypothesis, possibility |
| (noun) a belief that can guide behavior | - |
| theosophical | (adjective) of or relating to theosophy | - |
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| theosophism | (noun) belief in theosophy | - |
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| theosophist | (noun) a believer in theosophy | - |
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| theosophy | (noun) a system of belief based on mystical insight into the nature of God and the soul | - |
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| theoterrorism | (noun) terrorism for a religious purpose | - |
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| therapeutic | (adjective) relating to or involved in therapy | Synonyms: therapeutical |
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| (adjective) tending to cure or restore to health | Synonyms: alterative, curative, healing, remedial, sanative |
| (noun) a medicine or therapy that cures disease or relieve pain | Synonyms: curative, cure, remedy |
| therapeutical | (adjective) relating to or involved in therapy | Synonyms: therapeutic |
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| therapeutically | (adverb) for therapeutic purposes | - |
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