A Grammatical Dictionary of Botanical Latin

thyr-, thyri-, thyridi-, thyro-; -thyrium,-ii (s.n.II): in Gk. comp. deriving from among the following Greek words: thyra (thyre) (s.f.I), a door; generally, an entrance, access; thyris,-idos, (s.f.III) dim. of thyra, a small door, hence, a window, generally, an entrance, access; thyridion (s.n.II), dim. of thyra, and thyrion (s.n.II) dim. of thyra, a little door, wicket.

Thyridium,-ii (s.n.II): “a pale spot in the wing vein of some insects esp. of the orders Hymenoptera and Trichoptera [> Gk. thyridion, a window] (WIII); Thyrididae “a family of small moths having the wings marked with translucent spots [> Gk. thris, window, dim. of thyra door] (WIII).

Thyridium, Thyrinula, Thyriostroma, Thyrococcum, Thyrodochium, Thyronectria, Thyrosoma, Thyrospora, Thyrostroma, Thyrotheca.

Columnothyrium.