Math, interpolation, Statistics, extrapolation; guess, guesswork, conjecture, SI. guesstimate.
2. proximity, nearness, closeness, approach; propinquity, neighborhood, vicinity, vicinage; adjacency, ad-jacence, contiguity, abuttal.
appurtenance, n. adjunct, appanage, ancilla, auxiliary, appurtenant; attachment, appendage, annex; annexation, Rare, annexment; subordinate, small fry, Inf. small potatoes; subsidiary, subdivision, branch; supplement, supplementation, accessory, complement, accompaniment, concomitant, incidental, Astron. comes.
appurtenant, adj. 1. belonging, appertaining, incident, part of; pertinent, pertaining, applicable, to the point; relevant, related, relating, relative, germane, connected; appropriate, apropos, apposite, apt; proper, felicitous, well-suited, suitable, fit, fitting, befitting, meet.
-n. 2. adjunct, accessory, subordinate. See - appurtenance.
a priori, 1. deductive, inferential, from cause to effect. 2. presumptive, theoretical, postulational, suppositional, conjectural, hypothetical, speculative.
apropos, adv. 1. opportunely, timely, seasonably, suitably, appropriately, aptly, pertinently, to the purpose.
2. apropos of with reference or regard or respect to, in respect of.
-adj. 3. opportune, timely, seasonable; suitable, fitting, befitting, appropriate, applicable; apt, fit, meet, pat, to the point, pertinent, germane, relevant, apposite.
apt, adj. 1. inclined, tending toward, leaning toward, of a mind to; disposed, liable, given, ready, prone, subject, likely, incident, Archaic, propense.
2. gifted, well-endowed, talented, intelligent, intellectual, sagacious; clever, ingenious, adroit, neat; brilliant, astute, bright, agile, quick, facile, ready, smart, acute, sharp; ace, topflight, top drawer, first-rate, Inf. topnotch, Inf. crack, SI. crackerjack, SI. on the ball, Inf. whiz-bang, Brit. SI. whizzo; able, capable, competent, proficient, adept.
3. appropriate, proper, due, meet, becoming, felicitous; suitable, suited, congruous, fitting, befitting, well-adapted, apposite, pat; germane, relevant, pertinent, to the point, apropos, Latin, ad rem.
aptitude, n. 1. ability, capability, proficiency; gift, talent, endowment, faculty, facility, flair, knack, forte; capacity, potential, the stuff, Inf. what it takes, U.S. Inf the goods; predilection, proclivity, propensity; inclination, tendentiousness, proneness; penchant, bent, turn.
2. intelligence, intellect, genius, aptness, wit, mother wit, sagacity, head, brain, mind; ingenuity, astuteness, cleverness, brilliance, brightness, smartness, acuity, acuteness, sharpness, keenness; perspicacity, penetration.
3. aptness, fitness, qualification, preparedness, readiness; competency, adequacy, sufficiency, capableness.
aptness, n. suitability, suitableness, appropriateness, appositeness; applicability, relevance, relevancy, germaneness, relatedness; opportuneness, seasonability, timeliness, expedience, expediency, felicity, felicitousness; fitness, concordance, consonance, harmony, harmoniousness, congruousness.
aquarium, n. (all for display offish) tank, bowl, tub; pond, pool, pound, reservoir; vivarium; marine museum.
aquatic, adj. 1. marine, maritime, oceanic, pelagic, nautical, naval; littoral, shoreline; lacustrine, lake; fluvial, river.
-n. 2. aquatics water sports, sea sports; natation, swimming, diving, scuba diving; boating, sailing, yachting; water skiing, water polo; surfing, surfboarding.
aqueduct, n. 1. conduit, channel, race, watercourse, artificial waterway; strait, seaway, river, tributary, estuary.