TETRADITE
Tet"ra*dite, n. Etym: [See Tetrad.]
Defn: A person in some way remarkable with regard to the number four, as one born on the fourth day of the month, or one who reverenced four persons in the Godhead. Smart.
TETRADON
Tet"ra*don, n. (Zoöl.)
Defn: See Tetrodon.
TETRADONT
Tet"ra*dont, a. & n. (Zoöl.)
Defn: See Tetrodont.
TETRADRACHM; TETRADRACHMA
Tet"ra*drachm, Tet`ra*drach"ma, n. Etym: [NL. tetradrachma, fr. Gr.
Tetra-) +
Defn: A silver coin among the ancient Greeks, of the value of four drachms. The Attic tetradrachm was equal to 3s. 3d. sterling, or about 76 cents.
TETRADYMITE
Tet*rad"y*mite, n. Etym: [Gr. (Min.)
Defn: A telluride of bismuth. It is of a pale steel-gray color and metallic luster, and usually occurs in foliated masses. Calles also telluric bismuth.