Crossword Dictionary

What's The Definition Of Per-?

\Per-\ [See {Per}.] 1. 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. 2. (Chem.) Originally, denoting that the element to the name of which it is prefixed in the respective compounds exercised its highest valence; now, only that the element has a higher valence than in other similar compounds; thus, barium peroxide is the highest oxide of barium; while nitrogen and manganese peroxides, so-called, are not the highest oxides of those elements.
\Per\, prep. [L. Cf. {Far}, {For-}, {Pardon}, and cf. {Par}, prep.] Through; by means of; through the agency of; by; for; for each; as, per annum; per capita, by heads, or according to individuals; per curiam, by the court; per se, by itself, of itself. Per is also sometimes used with English words. {Per annum}, by the year; in each successive year; annually. {Per cent}, {Per centum}, by the hundred; in the hundred; -- used esp. of proportions of ingredients, rate or amount of interest, and the like; commonly used in the shortened form per cent. {Per diem}, by the day. [For other phrases from the Latin, see Quotations, Phrases, etc., from Foreign Languages, in the Supplement.]