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Counter :: Counter (adv.) A prefix meaning contrary, opposite, in opposition; as, counteract, counterbalance, countercheck. See Counter, adv. & a..

Neo- :: Neo- () A prefix meaning new, recent, late; and in chemistry designating specifically that variety of metameric hydrocarbons which, when the name was applied, had been recently classified, and in which at least one carbon atom in connected directly with four other carbon atoms; -- contrasted with normal and iso-; as, neopentane; the neoparaffins. Also used adjectively..

Cata :: Cata () The Latin and English form of a Greek preposition, used as a prefix to signify down, downward, under, against, contrary or opposed to, wholly, completely; as in cataclysm, catarrh. It sometimes drops the final vowel, as in catoptric; and is sometimes changed to cath, as in cathartic, catholic..

En- :: En- () A prefix signifying in or into, used in many English words, chiefly those borrowed from the French. Some English words are written indifferently with en-or in-. For ease of pronunciation it is commonly changed to em-before p, b, and m, as in employ, embody, emmew. It is sometimes used to give a causal force, as in enable, enfeeble, to cause to be, or to make, able, or feeble; and sometimes merely gives an intensive force, as in enchasten. See In-..

Dextro- :: Dextro- () A prefix, from L. dexter, meaning, pertaining to, or toward, the right.

Mister :: Mister (n.) A title of courtesy prefixed to the name of a man or youth. It is usually written in the abbreviated form Mr.

A- :: A- () A, as a prefix to English words, is derived from various sources. (1) It frequently signifies on or in (from an, a forms of AS. on), denoting a state, as in afoot, on foot, abed, amiss, asleep, aground, aloft, away (AS. onweg), and analogically, ablaze, atremble, etc. (2) AS. of off, from, as in adown (AS. ofd/ne off the dun or hill). (3) AS. a- (Goth. us-, ur-, Ger. er-), usually giving an intensive force, and sometimes the sense of away, on, back, as in arise, abide, ago. (4) Old English

Eu :: Eu () A prefix used frequently in composition, signifying well, good, advantageous; -- the opposite of dys-..

Privative :: Privative (a.) Implying privation or negation; giving a negative force to a word; as, alpha privative; privative particles; -- applied to such prefixes and suffixes as a- (Gr. /), un-, non-, -less..

E- :: E- () A Latin prefix meaning out, out of, from; also, without. See Ex-..

Exo :: Exo () A prefix signifying out of, outside; as in exocarp, exogen, exoskeleton..

Myria- :: Myria- () A prefix, esp. in the metric system, indicating ten thousand, ten thousand times; as, myriameter..

Bi- :: Bi- () In the composition of chemical names bi- denotes two atoms, parts, or equivalents of that constituent to the name of which it is prefixed, to one of the other component, or that such constituent is present in double the ordinary proportion; as, bichromate, bisulphide. Be- and di- are often used interchangeably..

Compare :: Compare (v. t.) To inflect according to the degrees of comparison; to state positive, comparative, and superlative forms of; as, most adjectives of one syllable are compared by affixing - er and -est to the positive form; as, black, blacker, blackest; those of more than one syllable are usually compared by prefixing more and most, or less and least, to the positive; as, beautiful, more beautiful, most beautiful..

Prosthetic :: Prosthetic (a.) Of or pertaining to prosthesis; prefixed, as a letter or letters to a word..

Ant- :: Ant- () See Anti-, prefix..

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

Sir :: Sir (n.) A respectful title, used in addressing a man, without being prefixed to his name; -- used especially in speaking to elders or superiors; sometimes, also, used in the way of emphatic formality..

Tetra- :: Tetra- () A combining form (also used adjectively) denoting four proportional or combining parts of the substance or ingredient denoted by the term to which it is prefixed, as in tetra-chloride, tetroxide..

Praeter- :: Praeter- () A prefix. See Preter-.

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