Te*traph"yl*lous(?), a. [Tetra- + Gr. a leaf.] (Bot.) Having four leaves; consisting of four distinct leaves or leaflets.
Tet"ra*pla(?), n.; etymologically pl., but syntactically sing. [NL., fr. Gr. tetraplo`os, tetraploy^s, fourfold.] A Bible consisting of four different Greek versions arranged in four columns by Origen; hence, any version in four languages or four columns.
Tet`rap*neu"mo*na(?), n. pl. [NL. See Tetra-, and Pneumo-.] (Zol.) A division of Arachnida including those spiders which have four lungs, or pulmonary sacs. It includes the bird spiders (Mygale) and the trapdoor spiders. See Mygale.
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Fri 14th December 2018