segment ventral

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• Ventral segment — Ventral Ven tral, a. [L. ventralis, fr. venter the belly; perhaps akin to G. wanst: cf. F. ventral.] 1. (Anat.) Of, pertaining to, or situated near, the belly, or ventral side, of an animal or of one of its parts; hemal; abdominal; as, the… …   The Collaborative International Dictionary of English

• Ventral segment — Segment Seg ment, n. [L. segmentum, fr. secare to cut, cut off: cf. F. segment. See {Saw} a cutting instrument.] 1. One of the parts into which any body naturally separates or is divided; a part divided or cut off; a section; a portion; as, a… …   The Collaborative International Dictionary of English

• Ventral — Ven tral, a. [L. ventralis, fr. venter the belly; perhaps akin to G. wanst: cf. F. ventral.] 1. (Anat.) Of, pertaining to, or situated near, the belly, or ventral side, of an animal or of one of its parts; hemal; abdominal; as, the ventral fin of …   The Collaborative International Dictionary of English

• Ventral fins — Ventral Ven tral, a. [L. ventralis, fr. venter the belly; perhaps akin to G. wanst: cf. F. ventral.] 1. (Anat.) Of, pertaining to, or situated near, the belly, or ventral side, of an animal or of one of its parts; hemal; abdominal; as, the… …   The Collaborative International Dictionary of English

• Segment — Seg ment, n. [L. segmentum, fr. secare to cut, cut off: cf. F. segment. See {Saw} a cutting instrument.] 1. One of the parts into which any body naturally separates or is divided; a part divided or cut off; a section; a portion; as, a segment of… …   The Collaborative International Dictionary of English

• Segment gear — Segment Seg ment, n. [L. segmentum, fr. secare to cut, cut off: cf. F. segment. See {Saw} a cutting instrument.] 1. One of the parts into which any body naturally separates or is divided; a part divided or cut off; a section; a portion; as, a… …   The Collaborative International Dictionary of English

• Segment of a line — Segment Seg ment, n. [L. segmentum, fr. secare to cut, cut off: cf. F. segment. See {Saw} a cutting instrument.] 1. One of the parts into which any body naturally separates or is divided; a part divided or cut off; a section; a portion; as, a… …   The Collaborative International Dictionary of English

• Segment of a sphere — Segment Seg ment, n. [L. segmentum, fr. secare to cut, cut off: cf. F. segment. See {Saw} a cutting instrument.] 1. One of the parts into which any body naturally separates or is divided; a part divided or cut off; a section; a portion; as, a… …   The Collaborative International Dictionary of English

• segment — Division of an appendage [Perez Farfante and Kensley, 1997]. Individual component of crustacean limb connected by movable articulation with adjoining segments. (Syn. podomere (not equivalent to somite, though used by some authors in this sense).… …   Crustacea glossary

• Ventral nerve cord — The ventral nerve cords make up the nervous system of some phyla of the invertebrates particularly within the nematodes, annelids and the arthropods. It usually consists of cerebral ganglia anteriorly with the nerve cords running down the ventral …   Wikipedia

• ventral nerve cord — Ganglia or connectives in somites joined by single or double tract of nerve fibers running longitudinally beneath alimentary canal [McLaughlin, 1980]. (Order Cladocera): Pair of widely separated, longitudinal nerve cords extending into trunk from …   Crustacea glossary