Segment of a sphere

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.

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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 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 — [ sɛgmɑ̃ ] n. m. • 1536; lat. segmentum, de secare « couper » 1 ♦ Portion, partie détachée d un ensemble. ♢ Math. Segment de droite : ensemble des points d une droite compris entre deux points donnés de la droite. Segment de sphère ou sphérique …   Encyclopédie Universelle

  • sphère — [ sfɛr ] n. f. • 1509; espere mil. XIIe; d ab. t. d astron.; lat. sphæra, gr. sphaira 1 ♦ Surface fermée dont tous les points sont situés à égale distance d un point donné; solide délimité par cette surface (⇒ 1. balle, 1. bille, boule). Centre,… …   Encyclopédie Universelle

  • Sphere — Sphère Pour les articles homonymes, voir Sphère (homonymie). Une sphère dans un espace euclidien En géométrie euclidienne, une sphère es …   Wikipédia en Français

  • 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

  • segment — [seg′mənt; ] for v. [, seg′ment] n. [L segmentum < secare, to cut: see SAW1] 1. any of the parts into which a body is separated or separable; division; section 2. Geom. a) a part of a figure, esp. of a circle or sphere, marked off or made… …   English World dictionary

  • 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

  • Sphère — Pour les articles homonymes, voir Sphère (homonymie). Une sphère dans un espace euclidien …   Wikipédia en Français

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