proto
(adjective) indicating the first or earliest or original; āāprotoā is a combining form in a word like āprotolanguageā that refers to the hypothetical ancestor of another language or group of languagesā
Source: WordNet® 3.1
proto (not comparable)
Prototypical; preceding the proper beginning of something
• Porto, Troop, porto, porto-, proot, troop, tropo, tropo-
Proto (plural Protos)
A surname.
• According to the 2010 United States Census, Proto is the 21009th most common surname in the United States, belonging to 1252 individuals. Proto is most common among White (92.73%) individuals.
• Porto, Troop, porto, porto-, proot, troop, tropo, tropo-
Source: Wiktionary
Pro"to-. Etym: [Gr. prw os first, a superl. fr. Pro-.]
1. A combining form prefix signifying first, primary, primordial; as, protomartyr, the first martyr; protomorphic, primitive in form; protoplast, a primordial organism; prototype, protozoan.
2. (Chem.) (a) Denoting the first or lowest of a series, or the one having the smallest amount of the element to the name of which it is prefixed; as protoxide, protochloride, etc. (b) 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.
Source: Webster’s Unabridged Dictionary 1913 Edition
14 April 2025
(noun) maximum clarity or distinctness of an image rendered by an optical system; āin focusā; āout of focusā
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