CANTHARIDES
Etymology
Noun
cantharides (uncountable)
Spanish fly, a vesicant extracted from the beetle Lytta vesicatoria (syn. Cantharis vesicatoria), popularly held to have aphrodisiac properties.
Source: Wiktionary
Can*thar"i*des, n. pl.
Definition: See cantharis.
CANTHARIS
Can"tha*ris, n.; pl. Cantharides. Etym: [L., a kind of beetle, esp.
the Spanish fly, Gr. (Zoöl.)
Definition: A beetle (Lytta, or Cantharis, vesicatoria), having an
elongated cylindrical body of a brilliant green color, and a nauseous
odor; the blister fly or blister beetle, of the apothecary; -- also
called Spanish fly. Many other species of Lytta, used for the same
purpose, take the same name. See Blister beetle, under Blister. The
plural form in usually applied to the dried insects used in medicine.
Source: Webster’s Unabridged Dictionary 1913 Edition