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Tetra- :: Tetra- () A combining form or prefix signifying four, as in tetrabasic, tetrapetalous..

Un- :: Un- (adv.) Un- is prefixed to nouns to express the absence of, or the contrary of, that which the noun signifies; as, unbelief, unfaith, unhealth, unrest, untruth, and the like..

Hyper- :: Hyper- () A prefix signifying over, above; as, hyperphysical, hyperthyrion; also, above measure, abnormally great, excessive; as, hyperaemia, hyperbola, hypercritical, hypersecretion..

Ambi- :: Ambi- () A prefix meaning about, around; -- used in words derived from the Latin..

Proto- :: Proto- () Sometimes used as equivalent to mono-, as indicating that the compound has but one atom of the element to the name of which it is prefixed. Also used adjectively..

Ge- :: Ge- () An Anglo-Saxon prefix. See Y-.

Supra-acromial :: Supra (adv.) Over; above; before; also, beyond; besides; -- much used as a prefix..

Per- :: Per- () A prefix used to signify through, throughout, by, for, or as an intensive as perhaps, by hap or chance; perennial, that lasts throughout the year; perforce, through or by force; perfoliate, perforate; perspicuous, evident throughout or very evident; perplex, literally, to entangle very much..

Ana- :: Ana- () A prefix in words from the Greek, denoting up, upward, throughout, backward, back, again, anew..

Mal- :: Mal- () A prefix in composition denoting ill,or evil, F. male, adv., fr. malus, bad, ill. In some words it has the form male-, as in malediction, malevolent. See Malice..

Magneto- :: Magneto- () A prefix meaning pertaining to, produced by, or in some way connected with, magnetism..

Peri- :: Peri- () A prefix used to signify around, by, near, over, beyond, or to give an intensive sense; as, perimeter, the measure around; perigee, point near the earth; periergy, work beyond what is needed; perispherical, quite spherical..

Quasi :: Quasi () As if; as though; as it were; in a manner sense or degree; having some resemblance to; qualified; -- used as an adjective, or a prefix with a noun or an adjective; as, a quasi contract, an implied contract, an obligation which has arisen from some act, as if from a contract; a quasi corporation, a body that has some, but not all, of the peculiar attributes of a corporation; a quasi argument, that which resembles, or is used as, an argument; quasi historical, apparently historical, seemi

Di- :: Di- () A prefix denoting through; also, between, apart, asunder, across. Before a vowel dia-becomes di-; as, diactinic; dielectric, etc..

Im- :: Im- () A form of the prefix in- not, and in- in. See In-. Im- also occurs in composition with some words not of Latin origin; as, imbank, imbitter..

Y- :: Y- () A prefix of obscure meaning, originally used with verbs, adverbs, adjectives, nouns, and pronouns. In the Middle English period, it was little employed except with verbs, being chiefly used with past participles, though occasionally with the infinitive Ycleped, or yclept, is perhaps the only word not entirely obsolete which shows this use..

Met- :: Met- () A prefix meaning between, with, after, behind, over, about, reversely; as, metachronism, the error of placing after the correct time; metaphor, lit., a carrying over; metathesis, a placing reversely..

Poly :: Poly (n.) A whitish woolly plant (Teucrium Polium) of the order Labiatae, found throughout the Mediterranean region. The name, with sundry prefixes, is sometimes given to other related species of the same genus..

Archi- :: Archi- () A prefix signifying chief, arch; as, architect, archiepiscopal. In Biol. and Anat. it usually means primitive, original, ancestral; as, archipterygium, the primitive fin or wing..

Trimethyl :: Trimethyl () A prefix or combining form (also used adjectively) indicating the presence of three methyl groups.

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