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 segment of an orange; a segment of a compound or divided leaf. [1913 Webster]

2. (Geom.) A part cut off from a figure by a line or plane; especially, that part of a circle contained between a chord and an arc of that circle, or so much of the circle as is cut off by the chord; as, the segment acb in the Illustration. [1913 Webster]

3. (Mach.) (a) A piece in the form of the sector of a circle, or part of a ring; as, the segment of a sectional fly wheel or flywheel rim. (b) A segment gear. [1913 Webster]

4. (Biol.) (a) One of the cells or division formed by segmentation, as in egg cleavage or in fissiparous cell formation. (b) One of the divisions, rings, or joints into which many animal bodies are divided; a somite; a metamere; a somatome. [1913 Webster]

{Segment gear}, a piece for receiving or communicating reciprocating motion from or to a cogwheel, consisting of a sector of a circular gear, or ring, having cogs on the periphery, or face.

{Segment of a line}, the part of a line contained between two points on it.

{Segment of a sphere}, the part of a sphere cut off by a plane, or included between two parallel planes.

{Ventral segment}. (Acoustics) See {Loor}, n., 5. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

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  • 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 — ► NOUN 1) each of the parts into which something is divided. 2) Geometry a part of a circle cut off by a chord, or a part of a sphere cut off by a plane not passing through the centre. 3) Zoology each of a series of similar anatomical units of… …   English terms dictionary

  • sphere — sphereless, adj. spherelike, adj. /sfear/, n., v., sphered, sphering. n. 1. Geom. a. a solid geometric figure generated by the revolution of a semicircle about its diameter; a round body whose surface is at all points equidistant from the center …   Universalium

  • segment — I. noun Etymology: Latin segmentum, from secare to cut more at saw Date: 1570 1. a portion cut off from a geometric figure by one or more points, lines, or planes: as a. the area of a circle bounded by a chord and an arc of that circle b. the… …   New Collegiate Dictionary

  • segment — [ sɛgm(ə)nt] noun 1》 each of the parts into which something is or may be divided. 2》 Geometry a part of a circle cut off by a chord, or a part of a sphere cut off by a plane not passing through the centre. 3》 Phonetics the smallest distinct part… …   English new terms dictionary

  • segment — n. & v. n. 1 each of several parts into which a thing is or can be divided or marked off. 2 Geom. a part of a figure cut off by a line or plane intersecting it, esp.: a the part of a circle enclosed between an arc and a chord. b the part of a… …   Useful english dictionary

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