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Dys- :: Dys- () An inseparable prefix, fr. the Greek / hard, ill, and signifying ill, bad, hard, difficult, and the like; cf. the prefixes, Skr. dus-, Goth. tuz-, OHG. zur-, G. zer-, AS. to-, Icel. tor-, Ir. do-..

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..

O :: O' () A prefix to Irish family names, which signifies grandson or descendant of, and is a character of dignity; as, O'Neil, O'Carrol..

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..

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..

Prefixing :: Prefixing (p. pr. & vb. n.) of Prefi.

Mac :: Mac () A prefix, in names of Scotch origin, signifying son..

Pro- :: Pro- () A prefix signifying before, in front, forth, for, in behalf of, in place of, according to; as, propose, to place before; proceed, to go before or forward; project, to throw forward; prologue, part spoken before (the main piece); propel, prognathous; provide, to look out for; pronoun, a word instead of a noun; proconsul, a person acting in place of a consul; proportion, arrangement according to parts..

Ferro- :: Ferro- () A prefix, or combining form, indicating ferrous iron as an ingredient; as, ferrocyanide..

Deka- :: Deka- () A prefix signifying ten. See Deca-.

Roseo- :: Roseo- () A prefix (also used adjectively) signifying rose-red; specifically used to designate certain rose-red compounds (called roseo-cobaltic compounds) of cobalt with ammonia. Cf. Luteo-.

Ad- :: Ad- () As a prefix ad- assumes the forms ac-, af-, ag-, al-, an-, ap-, ar-, as-, at-, assimilating the d with the first letter of the word to which ad- is prefixed. It remains unchanged before vowels, and before d, h, j, m, v. Examples: adduce, adhere, adjacent, admit, advent, accord, affect, aggregate, allude, annex, appear, etc. It becomes ac- before qu, as in acquiesce..

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..

Poly- :: Poly- (a.) A combining form or prefix from Gr. poly`s, many; as, polygon, a figure of many angles; polyatomic, having many atoms; polychord, polyconic..

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

Synacme :: Syn- () A prefix meaning with, along with, together, at the same time. Syn- becomes sym- before p, b, and m, and syl- before l..

Enter- :: Enter- () A prefix signifying between, among, part..

Prolegomenon :: Prolegomenon (n.) A preliminary remark or observation; an introductory discourse prefixed to a book or treatise.

Nitroso- :: Nitroso- () (/ / /). (Chem.) A prefix (also used adjectively) designating the group or radical NO, called the nitroso group, or its compounds..

Demi- :: Demi- () A prefix, signifying half..

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