Prefix
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.
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.
Source: Webster's dictionaryCloses April 21.) CARREÑO-A show based on the life of Teresa Carreño, the Venezuelan composer, pianist, conductor, and singer Written and per- formed by Pamela Ross and directed by Gene Frankel. Source: Internet
Phyllis Newman sub- stitutes for Miss Harris at the matinee per- formances (Shubert, 44th St., W. 246-5990. Source: Internet
PFAS is an acronym for a collection of per- and polyfluoroalkyl substances, which were used in a variety of products such as firefighting foam, non-stick cookware and Scotchgard. Source: Internet
The test was to check for precursors to a suite of symptoms health officials link to exposure to per- and polyfluoroalkyl substances called PFAS, (also called perfluorinated chemicals, or PFCs). Source: Internet
FAI was alerted Oct. 27, 2017 that concentrations of Per- and Polyfluoroalkyl Substances (PFAS) were present in the groundwater at the Aircraft Rescue and Firefighting (ARFF) Training Areas. Source: Internet
Consider the chlorine oxoanion family: First, think of the -ate ion as being the "base" name, in which case the addition of a per- prefix adds an oxygen. Source: Internet