| accidental | (adjective) not of prime or central importance | Synonyms: incidental, nonessential |
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| (adjective) happening by chance or unexpectedly or unintentionally | Synonyms: inadvertent |
| acropetal | (adjective) of leaves or flowers; developing or opening in succession from base to apex | - |
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| actinomycetal | (adjective) of or belonging to the actinomycetes | Synonyms: actinomycetous |
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| alimental | (adjective) of or providing nourishment | Synonyms: alimentary, nourishing, nutrient, nutritious, nutritive |
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| anecdotal | (adjective) having the character of an anecdote | - |
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| (adjective) characterized by or given to telling anecdotes | Synonyms: anecdotic, anecdotical |
| anorectal | (adjective) pertaining to the anus and rectum considered together | - |
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| antecubital | (adjective) of or relating to the region of the arm in front of the elbow | - |
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| antenatal | (adjective) occurring or existing before birth | Synonyms: antepartum, prenatal |
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| antidotal | (adjective) counteracting the effects of a poison | - |
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| aortal | (adjective) of or relating to the aorta | Synonyms: aortic |
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| aplacental | (adjective) having no placenta | - |
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| astomatal | (adjective) lacking a stoma or stomata | - |
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| basipetal | (adjective) of leaves or flowers; developing or opening in succession from apex to base | - |
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| bicipital | (adjective) having two heads or points of origin as a biceps | - |
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| bimetal | (adjective) formed of two different metals or alloys; especially in sheets bonded together | Synonyms: bimetallic |
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| brutal | (adjective) disagreeably direct and precise | - |
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| (adjective) resembling a beast; showing lack of human sensibility | Synonyms: beastly, bestial, brute, brutish |
| (adjective) punishingly harsh | Synonyms: unrelenting |
| (adjective) (of persons or their actions) able or disposed to inflict pain or suffering | Synonyms: barbarous, cruel, fell, roughshod, savage, vicious |
| capital | (adjective) of principal importance | - |
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| (adjective) first-rate | - |
| (adjective) uppercase | Synonyms: great, majuscule |
| centripetal | (adjective) tending to move toward a center | - |
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| (adjective) of a nerve fiber or impulse originating outside and passing toward the central nervous system | Synonyms: receptive, sensory |
| (adjective) tending to unify | Synonyms: unifying |
| chaetal | (adjective) of or relating to chaetae (setae or bristles) | - |
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| coastal | (adjective) located on or near or bordering on a coast | - |
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| (adjective) of or relating to a coast | - |
| (adjective) along or following a coast | Synonyms: coastwise |
| coincidental | (adjective) occurring or operating at the same time | Synonyms: co-occurrent, coincident, coinciding, concurrent, cooccurring, simultaneous |
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| coital | (adjective) of or relating to coitus or copulation | Synonyms: copulatory |
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| colorectal | (adjective) relating to or affecting the colon and the rectum | - |
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| compartmental | (adjective) divided up into compartments or categories | Synonyms: compartmentalised, compartmentalized |
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| complemental | (adjective) acting as or providing a complement (something that completes the whole) | Synonyms: complementary, completing |
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| congenital | (adjective) present at birth but not necessarily hereditary; acquired during fetal development | Synonyms: inborn, innate |
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| consonantal | (adjective) being or marked by or containing or functioning as a consonant | - |
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| (adjective) relating to or having the nature of a consonant | - |
| continental | (adjective) being or concerning or limited to a continent especially the continents of North America or Europe | - |
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| (adjective) of or relating to or characteristic of a continent | - |
| (adjective) of or relating to or concerning the American colonies during and immediately after the American Revolutionary War | - |
| contrapuntal | (adjective) having two or more independent but harmonically related melodic parts sounding together | Synonyms: polyphonic |
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| (adjective) relating to or characteristic of or according to the rules of counterpoint | - |
| corticipetal | (adjective) of a nerve fiber or impulse originating outside and passing toward the cerebral cortex | Synonyms: corticoafferent |
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| costal | (adjective) of or relating to or near a rib | - |
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| crustal | (adjective) of or relating to or characteristic of the crust of the earth or moon | - |
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| cubital | (adjective) of or relating to the elbow | - |
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| curtal | (adjective) (archaic) docked | - |
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| dental | (adjective) of or relating to the teeth | - |
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| (adjective) of or relating to dentistry | - |
| departmental | (adjective) of or relating to a department | - |
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| detrimental | (adjective) (sometimes followed by `to') causing harm or injury | Synonyms: damaging, prejudicial, prejudicious |
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| developmental | (adjective) of or relating to or constituting development | - |
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| dialectal | (adjective) belonging to or characteristic of a dialect | - |
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| digital | (adjective) of a circuit or device that represents magnitudes in digits | - |
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| (adjective) relating to or performed with the fingers | - |
| (adjective) displaying numbers rather than scale positions | - |
| distal | (adjective) situated farthest from point of attachment or origin, as of a limb or bone | - |
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| (adjective) directed away from the midline or mesial plane of the body | - |
| documental | (adjective) relating to or consisting of or derived from documents | Synonyms: documentary |
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| edental | (adjective) having few if any teeth | Synonyms: edentate, edentulate |
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| elemental | (adjective) relating to or being an element | - |
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| (adjective) relating to severe atmospheric conditions | - |
| (adjective) of or being the essential or basic part | Synonyms: basal, elementary, primary |
| environmental | (adjective) concerned with the ecological effects of altering the environment | - |
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| (adjective) of or relating to the external conditions or surroundings | - |
| experimental | (adjective) relating to or based on experiment | - |
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| (adjective) relying on observation or experiment | Synonyms: data-based, observational |
| (adjective) of the nature of or undergoing an experiment | - |
| extramarital | (adjective) characterized by adultery | Synonyms: adulterous, extracurricular |
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| fatal | (adjective) bringing death | - |
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| (adjective) having momentous consequences; of decisive importance | Synonyms: fateful |
| (adjective) controlled or decreed by fate; predetermined | Synonyms: fateful |
| (adjective) (of events) having extremely unfortunate or dire consequences; bringing ruin | Synonyms: black, calamitous, disastrous, fateful |
| festal | (adjective) offering fun and gaiety | Synonyms: festive, gay, merry |
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| fetal | (adjective) of or relating to a fetus | Synonyms: foetal |
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| firmamental | (adjective) relating to the firmament or upper regions | - |
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| foetal | (adjective) of or relating to a fetus | Synonyms: fetal |
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| fragmental | (adjective) consisting of small disconnected parts | Synonyms: fragmentary |
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| frontal | (adjective) of or relating to the front of an advancing mass of air | - |
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| (adjective) meeting front to front | Synonyms: head-on |
| (adjective) belonging to the front part | - |
| (adjective) of or adjacent to the forehead or frontal bone | - |
| fundamental | (adjective) being or involving basic facts or principles | Synonyms: rudimentary, underlying |
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| (adjective) serving as an essential component | Synonyms: cardinal, central, key, primal |
| (adjective) far-reaching and thoroughgoing in effect especially on the nature of something | Synonyms: profound |
| genital | (adjective) of or relating to the external sex organs | Synonyms: venereal |
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| glottal | (adjective) of or relating to or produced by the glottis | - |
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| governmental | (adjective) relating to or dealing with the affairs or structure of government or politics or the state | - |
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| haematal | (adjective) relating to the blood vessels or blood | Synonyms: haemal, hemal, hematal |
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| hematal | (adjective) relating to the blood vessels or blood | Synonyms: haemal, haematal, hemal |
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| horizontal | (adjective) parallel to or in the plane of the horizon or a base line | - |
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| ictal | (adjective) of or relating to a seizure or convulsion | Synonyms: ictic |
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| immortal | (adjective) not subject to death | - |
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| implemental | (adjective) serving or acting as a means or aid | Synonyms: instrumental, subservient |
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| incidental | (adjective) (sometimes followed by `to') minor or casual or subordinate in significance or nature or occurring as a chance concomitant or consequence | Synonyms: incident |
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| (adjective) not of prime or central importance | Synonyms: accidental, nonessential |
| (adjective) occurring with or following as a consequence | Synonyms: accompanying, attendant, collateral, concomitant, consequent, ensuant, resultant, sequent |
| incremental | (adjective) increasing gradually by regular degrees or additions | - |
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| instrumental | (adjective) relating to or designed for or performed on musical instruments | - |
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| (adjective) serving or acting as a means or aid | Synonyms: implemental, subservient |
| integumental | (adjective) of or relating to the integument | Synonyms: integumentary |
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| intercontinental | (adjective) extending or taking place between or among continents | - |
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| intercostal | (adjective) located or occurring between the ribs | - |
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| interdepartmental | (adjective) between or among departments | - |
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| intradepartmental | (adjective) within a department | - |
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| judgmental | (adjective) depending on judgment | - |
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| marital | (adjective) of or relating to the state of marriage | Synonyms: married, matrimonial |
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| maxillodental | (adjective) of or relating to the upper jaw and its associated teeth | - |
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| mental | (adjective) involving the mind or an intellectual process | - |
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| (adjective) of or relating to the mind | - |
| (adjective) of or relating to the chin- or liplike structure in insects and certain mollusks | - |
| (adjective) of or relating to the chin or median part of the lower jaw | Synonyms: genial |
| (adjective) affected by a disorder of the mind | - |
| metal | (adjective) containing or made of or resembling or characteristic of a metal | Synonyms: metallic |
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| monumental | (adjective) relating or belonging to or serving as a monument | - |
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| (adjective) imposing in size or bulk or solidity | Synonyms: massive, monolithic |
| (adjective) of outstanding significance | - |
| mortal | (adjective) subject to death | - |
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| (adjective) unrelenting and deadly | - |
| (adjective) involving loss of divine grace or spiritual death | Synonyms: deadly |
| (adjective) causing or capable of causing death | Synonyms: deadly, deathly |
| musculoskeletal | (adjective) relating to muscles and skeleton | - |
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| natal | (adjective) relating to or accompanying birth | - |
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| (adjective) of or relating to the buttocks | - |
| neandertal | (adjective) ill-mannered and coarse and contemptible in behavior or appearance | Synonyms: boorish, loutish, neanderthal, oafish, swinish |
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| neonatal | (adjective) relating to or affecting the infant during the first month after birth | - |
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| noncommittal | (adjective) refusing to bind oneself to a particular course of action or view or the like | - |
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| nonfatal | (adjective) not bringing death | - |
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| nonjudgmental | (adjective) refraining from making judgments especially ones based on personal opinions or standards | - |
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| nonmetal | (adjective) not containing or resembling or characteristic of a metal | Synonyms: nonmetallic |
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| nonsegmental | (adjective) having a body that is not divided into segments | Synonyms: unsegmented |
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| occidental | (adjective) denoting or characteristic of countries of Europe and the western hemisphere | Synonyms: Hesperian |
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| occipital | (adjective) of or relating to the occiput | - |
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| octal | (adjective) of or pertaining to a number system having 8 as its base | - |
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| orbital | (adjective) of or relating to an orbit | - |
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| (adjective) of or relating to the eye socket | - |
| oriental | (adjective) denoting or characteristic of countries of the Far East | - |
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| (adjective) denoting or characteristic of countries of Asia; 'oriental civilization' | - |
| ornamental | (adjective) serving an esthetic rather than a useful purpose | Synonyms: cosmetic, decorative |
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| palatal | (adjective) relating to or lying near the palate | Synonyms: palatine |
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| (adjective) produced with the front of the tongue near or touching the hard palate (as `y') or with the blade of the tongue near the hard palate (as `ch' in `chin' or `j' in `gin') | Synonyms: palatalised, palatalized |
| parental | (adjective) relating to or characteristic of or befitting a parent | Synonyms: maternal, paternal |
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| (adjective) designating the generation of organisms from which hybrid offspring are produced | - |
| parietal | (adjective) of or relating to or associated with the parietal bones in the cranium | - |
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| pentecostal | (adjective) of or relating to or occurring at Pentecost | - |
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| (adjective) of or relating to or characteristic of any of various Pentecostal religious bodies or their members | - |
| perinatal | (adjective) occurring during the period around birth (5 months before and 1 month after) | - |
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| periodontal | (adjective) of or relating to or involving or practicing periodontics | Synonyms: periodontic |
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