Tes´selated (tessellatus, made of small square stones, checkered + ed), arranged in small squares; checkered or reticulated in a regular manner.

Testa´ceous (testaceus, consisting of tiles or sherds, < testa, tile, shell), same as brick-red.

Tetan´ic (tetanicus, affected with tetanus), pertaining to or characterized by tetanus; tetanic spasm; tonic spasm of the voluntary muscles as seen in tetanus, strychnic poisoning, etc.

Tetra- (quatuor, four), prefix signifying “four.”

Tet´raspore (Gr—four, + seed), four spores forming one.

Thala´mium (Gr—inner chamber, bedroom, bed), synonym for hymenium.

Thal´logen (Gr—a young shoot, + Gr—producing), same as thallophyte.

Thal´lophyte (Gr—a young shoot, + Gr—a plant), one of the so-called “lower cryptogams,” plants in which the vegetative body usually consists of a thallus.

Thal´lus (Gr—a young shoot or twig), a vegetative body which is not differentiated into a true root, stem and leaf, has no true vessels or woody fiber; in fungi it is the whole body of the plant not serving directly as an organ of reproduction, i. e.: mycelium, if any, and sporophore but not including the hymenial layer.

The´ca (Gr—a case, box, receptacle, + put, place), a sac or case, generally used in the sense of capsule.