brood n. [A.S. brod] The individuals hatched at the same time from eggs by a single parent and normally mature at about the same time.
brood canal (ARTHRO: Insecta) In Stylopidea, the passage between the female parasite and its puparium; a brood chamber.
brood capsule (PLATY: Cestoda) A small hydatid cyst containing 10 to 30 protoscolices; parasites of carnivores.
brood chamber 1. (ARTHRO: Crustacea) a. In Cladocera, a dorsal space between the trunk and enveloping carapace containing developing eggs and newly hatched young. b. In Peracarida, a space arising from the coxae of the thoracic limbs, forming a marsupium in which eggs develop directly, without external metamorphosis. 2. (ARTHRO: Insecta) see brood canal. 3. (BRYO) a. In Gymnolaemata, water-filled space partly enclosed by the body wall of one or more polymorphs, in which embryos grow during development. see ovicell. b. In Stenolaemata, a zooidal or extrazooidal internal coelomic chamber that encloses eggs developing into larvae. 4. (ECHINOD) see marsupium. 5. (MOLL: Gastropoda) In female Argonauta , a beautiful, calcareous, bivalve case secreted by the two dorsal arms into which the eggs are deposited; females retain and usually remain with the posterior of her body in the case; when disturbed, she withdraws completely into the retreat.
brood pouch Any space or sac-like cavity utilized as a uterus, in which eggs or embryos are developed; a brood chamber, ovisac or marsupium.
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