| lengthen | (verb) become long or longer | - |
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| (verb) make longer | - |
| lengthened | (adjective) drawn out or made longer spatially | Synonyms: elongated, extended, prolonged |
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| lengthening | (noun) the act of prolonging something | Synonyms: perpetuation, prolongation, protraction |
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| lichen | (noun) any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc. | - |
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| (noun) any of several eruptive skin diseases characterized by hard thick lesions grouped together and resembling lichens growing on rocks | - |
| litheness | (noun) the gracefulness of a person or animal that is flexible and supple | Synonyms: lissomeness, suppleness |
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| mephenytoin | (noun) a toxic anticonvulsant drug (trade name Mesantoin) used in the treatment of epilepsy when less toxic anticonvulsants have been ineffective | Synonyms: Mesantoin |
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| methenamine | (noun) antibacterial agent (trade names Mandelamine and Urex) that is contained in many products that are used to treat urinary infections | Synonyms: Mandelamine, Urex |
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| methylphenidate | (noun) central nervous system stimulant (trade name Ritalin) used in the treatment of narcolepsy in adults and attention deficit disorder in children | Synonyms: Ritalin |
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| millihenry | (noun) a unit of inductance equal to one thousandth of a henry | - |
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| misapprehend | (verb) interpret in the wrong way | Synonyms: be amiss, misconceive, misconstrue, misinterpret, misunderstand |
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| misapprehension | (noun) an understanding of something that is not correct | Synonyms: mistake, misunderstanding |
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| moorhen | (noun) black gallinule that inhabits ponds and lakes | Synonyms: Gallinula chloropus |
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| (noun) female red grouse | - |
| myasthenia | (noun) a chronic progressive disease characterized by chronic fatigue and muscular weakness (especially in the face and neck); caused by a deficiency of acetylcholine at the neuromuscular junctions | Synonyms: myasthenia gravis |
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| (noun) any muscular weakness | - |
| neurasthenia | (noun) nervous breakdown (not in technical use) | - |
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| neurasthenic | (adjective) of or relating to or suffering from neurasthenia | - |
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| (noun) a person suffering a nervous breakdown | - |
| noncomprehensive | (adjective) not comprehensive | Synonyms: incomprehensive |
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| noncomprehensively | (adverb) in a limited way | - |
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| nonprehensile | (adjective) not prehensile | - |
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| orphenadrine | (noun) a skeletal muscle relaxant (trade name Norflex) used to treat severe muscle strain and Parkinsonism | Synonyms: Norflex |
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| oxyphenbutazone | (noun) an anti-inflammatory drug (trade name Tandearil) used to treat arthritis and bursitis | Synonyms: Tandearil |
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| oxyphencyclimine | (noun) an anticholinergic drug (trade name Daricon) used in treating peptic ulcers | Synonyms: Daricon |
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| pantothen | (noun) a vitamin of the vitamin B complex that performs an important role in the oxidation of fats and carbohydrates and certain amino acids; occurs in many foods | Synonyms: pantothenic acid |
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| parthenocarpy | (noun) (botany) the development of a fruit without fertilization or seeds | - |
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| parthenogenesis | (noun) process in which an unfertilized egg develops into a new individual; common among insects and some other arthropods | Synonyms: parthenogeny |
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| (noun) human conception without fertilization by a man | Synonyms: parthenogeny, virgin birth |
| parthenogenetic | (adjective) (of reproduction) not involving the fusion of male and female gametes in reproduction | Synonyms: agamic, agamogenetic, agamous, apomictic |
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| parthenogeny | (noun) process in which an unfertilized egg develops into a new individual; common among insects and some other arthropods | Synonyms: parthenogenesis |
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| (noun) human conception without fertilization by a man | Synonyms: parthenogenesis, virgin birth |
| parthenote | (noun) a cell resulting from parthenogenesis | - |
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| peahen | (noun) female peafowl | - |
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| perphenazine | (noun) tranquilizer and antidepressant (trade name Triavil) sometimes used as an antiemetic for adults | Synonyms: Triavil |
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| pfannkuchen | (noun) puffy mildly sweet lemon-flavored egg mixture sprinkled with confectioners' sugar and served with jam or a wine or fruit sauce | Synonyms: german pancake |
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| phenacetin | (noun) a white crystalline compound used as an analgesic and also as an antipyretic | Synonyms: acetophenetidin, acetphenetidin |
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| phenacomys | (noun) any of several vole-like terrestrial or arboreal rodents of cold forested regions of Canada and western United States | - |
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| phenazopyridine | (noun) analgesic (trade name Pyridium) used to treat urinary tract infections | Synonyms: Pyridium |
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| phencyclidine | (noun) a drug used as an anesthetic by veterinarians; illicitly taken (originally in the form of powder or `dust') for its effects as a hallucinogen | Synonyms: angel dust, PCP, phencyclidine hydrochloride |
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| phenelzine | (noun) monoamine oxidase inhibitor (trade name Nardil) used to treat clinical depression | Synonyms: Nardil |
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| pheniramine | (noun) an antihistamine used in preparations to treat allergies and respiratory infections; used to treat rhinitis and skin rashes and pruritus | - |
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| phenobarbital | (noun) a long-acting barbiturate used as a sedative | Synonyms: Luminal, phenobarbitone, purple heart, sodium thiopental |
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| phenobarbitone | (noun) a long-acting barbiturate used as a sedative | Synonyms: Luminal, phenobarbital, purple heart, sodium thiopental |
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| phenol | (noun) any of a class of weakly acidic organic compounds; molecule contains one or more hydroxyl groups | - |
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| (noun) a toxic white soluble crystalline acidic derivative of benzene; used in manufacturing and as a disinfectant and antiseptic; poisonous if taken internally | Synonyms: carbolic acid, hydroxybenzene, oxybenzene, phenylic acid |
| phenolic | (noun) a thermosetting resin | Synonyms: phenolic resin, phenoplast |
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| phenolphthalein | (noun) a laxative used in many preparations under various trade names; also used as an acid-base indicator in titrations involving weak acids and strong bases because it is brilliant red at high alkalinity and colorless below pH 8 | - |
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| phenomenal | (adjective) of or relating to a phenomenon | - |
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| (adjective) extraordinarily good or great; used especially as intensifiers | Synonyms: fantastic, grand, howling, marvellous, marvelous, rattling, terrific, tremendous, wonderful, wondrous |
| phenomenality | (noun) The state or property of being very remarkable; highly extraordinary; amazing. | - |
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| phenomenally | (adverb) to a phenomenal degree | - |
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| phenomenology | (noun) a philosophical doctrine proposed by Edmund Husserl based on the study of human experience in which considerations of objective reality are not taken into account | - |
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| phenomenon | (noun) any state or process known through the senses rather than by intuition or reasoning | - |
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| (noun) a remarkable development | - |
| phenoplast | (noun) a thermosetting resin | Synonyms: phenolic, phenolic resin |
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| phenothiazine | (noun) a compound used primarily in veterinary medicine to rid farm animals of internal parasites | Synonyms: thiodiphenylamine |
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| phenotype | (noun) what an organism looks like as a consequence of the interaction of its genotype and the environment | - |
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| phenotypic | (adjective) of or relating to or constituting a phenotype | Synonyms: phenotypical |
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| phenotypical | (adjective) of or relating to or constituting a phenotype | Synonyms: phenotypic |
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| phensuximide | (noun) anticonvulsant (trade name Milontin) used to treat petit mal | Synonyms: Milontin |
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| phentolamine | (noun) a virility drug (trade name Vasomax) to treat erectile dysfunction in men | Synonyms: Vasomax |
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| phenylacetamide | (noun) a solid odourless chemical of leaf or flake-like appearance; used in rubber accelerator, dye, and camphor synthesis; metabolised to paracetamol (acetaminophen) | Synonyms: acetanilid, acetanilide |
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| phenylalanine | (noun) an essential amino acid found in proteins and needed for growth of children and for protein metabolism in children and adults; abundant in milk and eggs; it is normally converted to tyrosine in the human body | - |
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| phenylamine | (noun) oily poisonous liquid amine obtained from nitrobenzene and used to make dyes and plastics and medicines | Synonyms: aminobenzine, aniline, aniline oil |
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| phenylbutazone | (noun) anti-inflammatory drug (trade name Butazolidin) | Synonyms: Butazolidin |
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| phenylephrine | (noun) a powerful vasoconstrictor used to dilate the pupils and relieve nasal congestion | - |
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| phenylethylene | (noun) a colorless oily liquid; the monomer for polystyrene | Synonyms: cinnamene, styrene, vinylbenzene |
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| phenylketonuria | (noun) a genetic disorder of metabolism; lack of the enzyme needed to turn phenylalanine into tyrosine results in an accumulation of phenylalanine in the body fluids which causes various degrees of mental deficiency | Synonyms: PKU |
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| phenylpropanolamine | (noun) an adrenergic drug used in many preparations to relieve allergic reactions or respiratory infections | - |
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| phenyltoloxamine | (noun) antihistamine included in some preparations used to treat coughing and nasal congestion | - |
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| phenytoin | (noun) an anticonvulsant drug (trade name Dilantin) used to treat epilepsy and that is not a sedative | Synonyms: Dilantin, diphenylhydantoin |
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| polythene | (noun) a lightweight thermoplastic; used especially in packaging and insulation | Synonyms: polyethylene |
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| prehend | (verb) take into your hands deliberately | Synonyms: clutch, seize, take hold, take hold of |
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| prehensile | (adjective) adapted for grasping especially by wrapping around an object | - |
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| (adjective) immoderately desirous of acquiring e.g. wealth | Synonyms: avaricious, covetous, grabby, grasping, greedy |
| (adjective) having a keen intellect | - |
| prehension | (noun) the act of gripping something firmly with the hands (or the tentacles) | Synonyms: grasping, seizing, taking hold |
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| prehensor | (noun) the anterior pair of legs of a centipede that are modified to seize prey and inject venom from the toxicognaths | - |
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| propoxyphene | (noun) a mildly narcotic analgesic drug (trade name Darvon) related to methadone but less addictive | Synonyms: Darvon, propoxyphene hydrochloride |
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| refreshen | (verb) become or make oneself fresh again | Synonyms: freshen, freshen up, refresh |
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| (verb) make fresh again | Synonyms: freshen, refresh |
| reprehend | (verb) to rebuke or reprimand | - |
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| reprehensibility | (noun) being reprehensible; worthy of and deserving reprehension or reproof | - |
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| reprehensible | (adjective) bringing or deserving severe rebuke or censure | Synonyms: condemnable, criminal, deplorable, vicious |
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| reprehensibly | (adverb) in a manner or to a degree deserving blame or censure | Synonyms: culpably |
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| reprehension | (noun) an act or expression of criticism and censure | Synonyms: rebuke, reprimand, reproof, reproval |
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| reprehensively | (adverb) in a shameful manner | Synonyms: criminally |
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| restrengthen | (verb) make strong again | - |
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| rhenium | (noun) a rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum | Synonyms: atomic number 75, Re |
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| roughen | (verb) make rough or rougher | - |
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| roughened | (adjective) used of skin roughened as a result of cold or exposure | Synonyms: chapped, cracked |
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| ruthenium | (noun) a rare polyvalent metallic element of the platinum group; it is found associated with platinum | Synonyms: atomic number 44, Ru |
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| shenanigan | (noun) reckless or malicious behavior that causes discomfort or annoyance in others | Synonyms: devilment, devilry, deviltry, mischief-making, mischief, mischievousness, rascality, roguery, roguishness |
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| (noun) the use of tricks to deceive someone (usually to extract money from them) | Synonyms: chicane, chicanery, guile, trickery, wile |
| smoothen | (verb) become smooth | - |
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| (verb) make smooth or smoother, as if by rubbing | Synonyms: smooth |
| (verb) make (a surface) shine | Synonyms: polish, shine, smooth |
| smoothened | (adjective) made smooth by ironing | Synonyms: smoothed |
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| sphenion | (noun) the anterior tip of the parietal bone | - |
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| sphenoid | (noun) butterfly-shaped bone at the base of the skull | Synonyms: os sphenoidale, sphenoid bone |
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| sthene | (noun) a unit of force equal to 1000 newtons | - |
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| strengthen | (verb) give a healthy elasticity to | Synonyms: tone, tone up |
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| (verb) gain strength | - |
| (verb) make strong or stronger | Synonyms: beef up, fortify |
| strengthened | (adjective) given added strength or support | Synonyms: reinforced |
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| strengthener | (noun) a device designed to provide additional strength | Synonyms: reinforcement |
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| strengthening | (noun) the act of increasing the strength of something | - |
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| (noun) becoming stronger | - |
| subtrahend | (noun) the number to be subtracted from the minuend | - |
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| swamphen | (noun) any of various small aquatic birds of the genus Gallinula distinguished from rails by a frontal shield and a resemblance to domestic hens | Synonyms: gallinule, marsh hen, water hen |
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| 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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| thiodiphenylamine | (noun) a compound used primarily in veterinary medicine to rid farm animals of internal parasites | Synonyms: phenothiazine |
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| thrombasthenia | (noun) a rare autosomal recessive disease in which the platelets do not produce clots in the normal way and hemorrhage results | - |
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