Thursday, December 24, 2015

Acid test

Acid test (gold), a chemical or metallurgical test which uses acid, now also used as a general term for "verified", "approved", or "tested" in a large number of fields.

No comments:

synanthrope

 A synanthrope (from ancient Greek σύν sýn "together, with" and ἄνθρωπος ánthrōpos "man") is an organism that evolve...