PRIMARY a.
the largest feathers of the wing of a bird; primaries. -- Primary rocks (Geol.), a term early used for rocks supposed to have been first formed, being crystalline and containing no organic remains, as granite, gneiss, etc.; -- called also primitive rocks. The terms Secondary, Tertiary, and Quaternary rocks have also…
PROOF n.
y, and deemed impenetrable; properly, armor of proof. [Obs.] Shak. Artist's proof, a very early proof impression of an engraving, or the like; -- often distinguished by the artist's signature. -- Proof reader, one who reads, and marks correction in, proofs. See def. 5, above.