13-letter words starting with proto
- proto-elamite — the indigenous script of Elam, found on inscriptions and tablets from the fourth millennium b.c.
- protoactinium — protactinium.
- protochordate — any of the nonvertebrate chordates, as the tunicates, cephalochordates, and hemichordates.
- protolanguage — the reconstructed or postulated parent form of a language or a group of related languages.
- proton number — the number of positive charges or protons in the nucleus of an atom of a given element, and therefore also the number of electrons normally surrounding the nucleus. Symbol: Z. Abbreviation: at. no.;
- protonotariat — the prelates of the Roman Curia
On this page, we collect all 13-letter words starting with PROTO. It’s easy to find right word with a certain length. It is the easiest way to find 13-letter word that beginning with PROTO to use in Scrabble or Crossword puzzles.