deuterostome n. [Gr. deuteros, second; stoma, mouth] True coelomates with radial cleavage of the egg, the blastopore becoming the anus, the coelom formed by enterocoely, including Echinodermata, Chaetognatha, Hemicordata and Chordata. see protostome.
deuterotoky n. [Gr. deuteros, second; tokos, birth] Partheno-genetic reproduction in which progeny of both sexes are produced from female gametes. see arrhenotoky, the-lyotoky.
deutocerebral commissure (ARTHRO) The connection between the sensory neuropiles on both sides of the brain.
deutocerebral region (ARTHRO) That portion of a brain divided into dorsal sensory and ventral motor areas.
deutocerebrum n. [Gr. deuteros, second; L. cerebrum, brain] (ARTHRO) The median region of a brain which receives the antennal nerves (first antennae in crustaceans, see meso-cerebrum) and contains their association centers; lacking in chelicerates (scorpions, spiders and mites). deuterocere-bral a.
deutogyne n. [Gr. deuteros, second; gyne, woman] A female of a species which is morphologically different from the primogyne and has no male counterpart. see protogyne.
deutomalae n.pl. [Gr. deuterous, second; malon, cheek] 1. (ARTHRO: Symphyla) The second pair of mouth appendages in certain myriapods. 2. (CHAETO) A broad plate formed by the fusion of the second pair of mouth appendages.
deutonymph n. [Gr. deuteros, second; nymphe, chrysalis] (ARTHRO: Chelicerata) The second stage nymph of arach nids.
deutoplasm, deuteroplasm n. [Gr. deuteros, second; plasma, formed or molded] A substance other than the nucleus and cytoplasm in a cell, esp. yolk in an egg cell; metaplasm. see energid.
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