(linguistics) The theoretical, second-level proto-language of the Algic languages, spoken about 7000 years ago: the ancestor of Proto-Algonquian, Yurok, and Wiyot.

plural of proto-Muslim

A Muslim-like person who lived prior to Muhammad's first revelation. / An early Muslim; a follower of Islam in its early days.

Relating to proto-Muslims or to early Muslims.

plural of proto-ancestor

Alternative form of protoancestor

Relating to proto-oncogenes

ancestor language of the Czech language, descendant of Proto-Slavic, spoken between the 10th and 13th century

plural of proto-photon

(physics, rare) A theoretical but not yet detected particle proposed to explain, among other things, the mechanisms of gravity; a gauge boson.