tentorial macula (ARTHRO: Insecta) The depressions or dark spots marking the points of union of the dorsal tentorial arms and the epicranal wall near the antennae.
tentorial pits (ARTHRO: Insecta) External depressions on the surface of the head marking points of union of the arms with the outer wall of the head; usually two in the epis-tomal suture and one at the lower end of each postoccipital suture.
tentorium n.; pl. -oria [L. tentorium, tent] (ARTHRO: Insecta) Two anterior and two posterior apodemes (arms) that form the internal skeleton of the head, serving as a brace for the head and for the attachment of muscles; in Culicidae, the right and left halves are not connected.
tenuous a. [L. tenuis, thin] Thin, slender, delicate.
teratocyte n. [Gr. teras, monster; kytos, container] (ARTHRO: Insecta) In Lepidoptera Pieridae, unicellular forms resulting from the embryonic membranes of parasitic Braconidae.
teratogen n. [Gr. teras, monster; genes, producing] Any substance that causes or increases the incidence of congenital abnormalities in a population.
teratogenesis n. [Gr. teras, monster; genesis, beginning] The production of monstrous fetuses or growths.
teratogyne n. [Gr. teras, monster; gyne, woman] (ARTHRO: Insecta) In Hymenoptera, the aberrant form of female in a Formicidae colony, characterized by overdeveloped legs and antennae, and excess pilosity of the body or defective wings; formerly referred to as beta-females. see alphafemale.
teratology n. [Gr. teras, monster; logos, discourse] The biological study of structural malformations and monstrosities.
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