Brachyptery see brachypterous

brachystomatous a. [Gr. brachys, short; stoma, mouth] (ARTHRO: Insecta) Having a short proboscis, as certain Diptera.

brachytrachea n.; pl. -eae [Gr. brachys, short; tracheia, windpipe] (ARTHRO: Chelicerata) In Acari, an elongate, saclike structure, sometimes branched, that functions in respiration.

brachyurous a. [Gr. brachys, short; oura, tail] Having a reduced abdomen; having a short tail.

braconid venom gland (ARTHRO: Insecta) A type of venom gland where numerous gland tubes end basically in the reservoir that has muscles but no glandular elements. see apid venom gland.

bract n. [L. bractea, small leaf] (CNID: Hydrozoa) A protective medusoid (hydrophyllium or phyllozooid) siphonophoran with a simple or branched gastrovascular canal.

bracteiform a. [L. bractea, small leaf; forma, shape] Bractlike.

bracteose a. [L. bractea, small leaf] With numerous bracts.

bradyauxesis n. [Gr. bradys, slow; auxesis, growth] A form of heterauxesis in which the growth process of a part is less than that of the whole. see isauxesis bradygenesis n. [Gr. bradys, slow; genesis, beginning] Retarded development in ontogeny. see tachygenesis.

bradytelic a. [Gr. bradys, slow; telos, completion] Pertaining to evolution, evolving slowly; slower than the standard rate. see horotelic.

brain n. [A.S. braegen, brain] 1. The nervous center of invertebrates. 2. (ARTHRO) The cephalic nerve mass; the en-cephalon, the supraesophageal ganglion; the archicere-brum. 3. (NEMATA) The nerve ring and associated ganglia.

brain hormone (ARTHRO: Insecta) A secretion of the brain activating the prothoracic glands.

branch n.; pl. branches [OF. branche, branch] 1. That which puts forth branches. 2. A primary division of a taxonomic group. 3. A gill.

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