| adiabatic | (adjective) occurring without loss or gain of heat | - |
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| antemeridian | (adjective) before noon | - |
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| antheridial | (adjective) relating to or characterized by an antheridium | - |
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| arachnidian | (adjective) relating to or resembling a member of the class Arachnida | Synonyms: arachnoid, spiderlike, spiderly, spidery |
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| arcadian | (adjective) (used with regard to idealized country life) idyllically rustic | Synonyms: bucolic, pastoral |
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| archidiaconal | (adjective) of or relating to an archdeacon or his office | - |
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| basidial | (adjective) relating to or characterized by basidia | - |
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| biradial | (adjective) showing both bilateral and radial symmetry | - |
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| cardiac | (adjective) of or relating to the heart | - |
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| chlamydial | (adjective) of or pertaining to the sexually transmitted infection or to the parasite | - |
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| circadian | (adjective) of or relating to biological processes occurring at 24-hour intervals | - |
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| cordial | (adjective) diffusing warmth and friendliness | Synonyms: affable, amiable, genial |
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| (adjective) politely warm and friendly | - |
| (adjective) sincerely or intensely felt | - |
| custodial | (adjective) providing protective supervision; watching over or safeguarding | Synonyms: tutelar, tutelary |
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| diabatic | (adjective) involving a transfer of heat | - |
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| diabetic | (adjective) of or relating to or causing diabetes | - |
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| (adjective) suffering from diabetes | - |
| diabolic | (adjective) extremely evil or cruel; expressive of cruelty or befitting hell | Synonyms: demonic, diabolical, fiendish, hellish, infernal, satanic, unholy |
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| (adjective) showing the cunning or ingenuity or wickedness typical of a devil | Synonyms: devilish, diabolical, mephistophelean, mephistophelian |
| diabolical | (adjective) extremely evil or cruel; expressive of cruelty or befitting hell | Synonyms: demonic, diabolic, fiendish, hellish, infernal, satanic, unholy |
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| (adjective) showing the cunning or ingenuity or wickedness typical of a devil | Synonyms: devilish, diabolic, mephistophelean, mephistophelian |
| diachronic | (adjective) used of the study of a phenomenon (especially language) as it changes through time | Synonyms: historical |
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| diacritic | (adjective) capable of distinguishing | Synonyms: diacritical |
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| diacritical | (adjective) capable of distinguishing | Synonyms: diacritic |
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| diadromous | (adjective) (used of fish) migratory between fresh and salt waters | - |
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| diagnosable | (adjective) capable of being diagnosed | - |
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| diagnostic | (adjective) concerned with diagnosis; used for furthering diagnosis | - |
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| (adjective) characteristic or indicative of a disease | Synonyms: symptomatic |
| diagonal | (adjective) having an oblique or slanted direction | Synonyms: aslant, aslope, slanted, slanting, sloped, sloping |
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| (adjective) connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face | - |
| diagonalizable | (adjective) capable of being transformed into a diagonal matrix | - |
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| diagrammatic | (adjective) shown or represented by diagrams | Synonyms: diagrammatical |
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| diagrammatical | (adjective) shown or represented by diagrams | Synonyms: diagrammatic |
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| dialectal | (adjective) belonging to or characteristic of a dialect | - |
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| dialectic | (adjective) of or relating to or employing dialectic | Synonyms: dialectical |
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| dialectical | (adjective) of or relating to or employing dialectic | Synonyms: dialectic |
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| diamagnetic | (adjective) relating to or exhibiting diamagnetism; slightly repelled by a magnet | - |
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| diamantine | (adjective) consisting of diamonds or resembling diamonds | - |
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| diametral | (adjective) related to or along a diameter | Synonyms: diametric, diametrical |
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| diametric | (adjective) related to or along a diameter | Synonyms: diametral, diametrical |
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| (adjective) characterized by opposite extremes; completely opposed | Synonyms: diametrical, opposite, polar |
| diametrical | (adjective) related to or along a diameter | Synonyms: diametral, diametric |
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| (adjective) characterized by opposite extremes; completely opposed | Synonyms: diametric, opposite, polar |
| dianoetic | (adjective) proceeding to a conclusion by reason or argument rather than intuition | Synonyms: discursive |
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| diaphanous | (adjective) so thin as to transmit light | Synonyms: cobwebby, filmy, gauze-like, gauzy, gossamer, see-through, sheer, transparent, vaporous, vapourous |
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| diaphoretic | (adjective) inducing perspiration | Synonyms: sudorific |
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| diaphyseal | (adjective) relating to the diaphysis of a bone | Synonyms: diaphysial |
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| diaphysial | (adjective) relating to the diaphysis of a bone | Synonyms: diaphyseal |
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| diarrheal | (adjective) of or relating to diarrhea | Synonyms: diarrheic, diarrhetic, diarrhoeal, diarrhoeic, diarrhoetic |
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| diarrheic | (adjective) of or relating to diarrhea | Synonyms: diarrheal, diarrhetic, diarrhoeal, diarrhoeic, diarrhoetic |
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| diarrhetic | (adjective) of or relating to diarrhea | Synonyms: diarrheal, diarrheic, diarrhoeal, diarrhoeic, diarrhoetic |
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| diarrhoeal | (adjective) of or relating to diarrhea | Synonyms: diarrheal, diarrheic, diarrhetic, diarrhoeic, diarrhoetic |
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| diarrhoeic | (adjective) of or relating to diarrhea | Synonyms: diarrheal, diarrheic, diarrhetic, diarrhoeal, diarrhoetic |
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| diarrhoetic | (adjective) of or relating to diarrhea | Synonyms: diarrheal, diarrheic, diarrhetic, diarrhoeal, diarrhoeic |
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| diastolic | (adjective) of or relating to a diastole or happening during a diastole | - |
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| diatomic | (adjective) of or relating to a molecule made up of two atoms | - |
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| diatonic | (adjective) based on the standard major or minor scales consisting of 5 tones and 2 semitones without modulation by accidentals | - |
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| (adjective) based on or using the five tones and two semitones of the major or minor scales of western music | - |
| diazo | (adjective) relating to or containing diazonium | - |
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| euclidian | (adjective) relating to geometry as developed by Euclid | Synonyms: euclidean |
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| gerundial | (adjective) relating to or like a gerund | - |
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| gladiatorial | (adjective) of or relating to or resembling gladiators or their combat | - |
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| immediate | (adjective) having no intervening medium | - |
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| (adjective) very close or connected in space or time | Synonyms: contiguous |
| (adjective) performed with little or no delay | Synonyms: prompt, quick, straightaway |
| (adjective) of the present time and place | - |
| (adjective) immediately before or after as in a chain of cause and effect | - |
| incendiary | (adjective) involving deliberate burning of property | - |
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| (adjective) capable of catching fire spontaneously or causing fires or burning readily | - |
| (adjective) arousing to action or rebellion | Synonyms: incitive, inflammatory, instigative, rabble-rousing, seditious |
| intermediate | (adjective) lying between two extremes in time or space or state | - |
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| (adjective) around the middle of a scale of evaluation | Synonyms: average, medium |
| irremediable | (adjective) impossible to remedy or correct or redress | - |
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| mediaeval | (adjective) relating to or belonging to the Middle Ages | Synonyms: medieval |
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| (adjective) as if belonging to the Middle Ages; old-fashioned and unenlightened | Synonyms: gothic, medieval |
| (adjective) characteristic of the time of chivalry and knighthood in the Middle Ages | Synonyms: chivalric, knightly, medieval |
| medial | (adjective) relating to or situated in or extending toward the middle | Synonyms: median |
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| (adjective) dividing an animal into right and left halves | Synonyms: median |
| median | (adjective) relating to or situated in or extending toward the middle | Synonyms: medial |
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| (adjective) dividing an animal into right and left halves | Synonyms: medial |
| (adjective) relating to or constituting the middle value of an ordered set of values (or the average of the middle two in a set with an even number of values) | Synonyms: average |
| mediate | (adjective) acting through or dependent on an intervening agency | - |
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| (adjective) being neither at the beginning nor at the end in a series | Synonyms: in-between, middle |
| mediated | (adjective) acting or brought about through an intervening agency | - |
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| mediatorial | (adjective) of or relating to a mediator or the duties of a mediator | - |
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| mediatory | (adjective) of or related to or directed toward mediation | - |
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| meridian | (adjective) of or happening at noon | - |
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| (adjective) being at the best stage of development | Synonyms: prime |
| myocardial | (adjective) of or relating to the myocardium | - |
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| paediatric | (adjective) of or relating to the medical care of children | Synonyms: pediatric |
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| pediatric | (adjective) of or relating to the medical care of children | Synonyms: paediatric |
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| pericardiac | (adjective) located around the heart or relating to or affecting the pericardium | Synonyms: pericardial |
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| pericardial | (adjective) located around the heart or relating to or affecting the pericardium | Synonyms: pericardiac |
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| phyllodial | (adjective) having a phyllode | - |
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| postmeridian | (adjective) after midday | - |
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| postprandial | (adjective) following a meal (especially dinner) | - |
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| prandial | (adjective) of or relating to a meal | - |
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| precordial | (adjective) in front of the heart; involving the precordium | - |
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| preprandial | (adjective) preceding a meal (especially dinner) | - |
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| primordial | (adjective) having existed from the beginning; in an earliest or original stage or state | Synonyms: aboriginal, primaeval, primal, primeval |
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| quotidian | (adjective) found in the ordinary course of events | Synonyms: everyday, mundane, routine, unremarkable, workaday |
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| radial | (adjective) relating to or moving along or having the direction of a radius | - |
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| (adjective) relating to or near the radius | - |
| (adjective) issuing in rays from a common center; relating to rays of light | - |
| (adjective) arranged like rays or radii; radiating from a common center | Synonyms: radiate, stellate |
| radiant | (adjective) radiating or as if radiating light | Synonyms: beaming, beamy, effulgent, refulgent |
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| radiate | (adjective) having rays or ray-like parts as in the flower heads of daisies | - |
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| (adjective) arranged like rays or radii; radiating from a common center | Synonyms: radial, stellate |
| radiating | (adjective) diverging from a common point | - |
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| remediable | (adjective) capable of being remedied or redressed | - |
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| remedial | (adjective) tending or intended to rectify or improve | - |
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| (adjective) tending to cure or restore to health | Synonyms: alterative, curative, healing, sanative, therapeutic |
| repudiative | (adjective) rejecting emphatically; e.g. refusing to pay or disowning | - |
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| stipendiary | (adjective) pertaining to or of the nature of a stipend or allowance | - |
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| (adjective) for which money is paid | Synonyms: compensable, paying, remunerative, salaried |
| (adjective) receiving or eligible for compensation | Synonyms: compensated, remunerated, salaried |
| subsidiary | (adjective) functioning in a supporting capacity | Synonyms: auxiliary, supplemental, supplementary |
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| uncordial | (adjective) lacking warmth or friendliness | - |
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| undiagnosable | (adjective) not possible to diagnose | - |
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| undiagnosed | (adjective) eluding diagnosis | - |
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| unmediated | (adjective) having no intervening persons, agents, conditions | Synonyms: direct |
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| zodiacal | (adjective) relating to or included in the zodiac | - |
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