SEGMENT • DICTIONARY ONE.COM • Definition of Segment

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/sˈɛgmənt/ /sˌɛgmˈɛnt/ Listen

noun

Segment n.

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.

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.

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.

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.

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.

verb

Segment v. i. (Biol.) To divide or separate into parts in growth; to undergo segmentation, or cleavage, as in the segmentation of the ovum.

See images of 'Segment'

Etymology of 'Segment'

Collaborative International Dictionary of English 0.48

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"Segment" Quotes from Famous Books

... curvature of the earth. Newton's calculation was precisely similar. His plane glass was a tangent to his curved one. From its refractive index and focal distance he determined the diameter of the sphere of which his curved glass formed a segment, he measured the distances of his rings from the place of contact, and he calculated the depth between the tangent plane and the curved surface, exactly as the engineer would calculate the distance between his tangent plane and the surface of the sea. The wonder is, that, ...

— Six Lectures on Light - Delivered In The United States In 1872-1873 • John Tyndall

... leading battalion of the right segment of the great column, and the left was still moving steadily up. The British Guards, too, who had followed the broken battalion of the French down the hill, were arrested by a cry of "Cavalry!" and fell ...

— Deeds that Won the Empire - Historic Battle Scenes • W. H. Fitchett

... fern, but with fronds rather larger, especially the terminal segment; also more rigid and coarser in appearance. Stalks and fronds minutely glandular beneath. Lower pinnules of the lateral divisions scarcely longer than the others. Often called "Limestone Polypody," the beech ferns having formerly been classed with the polypodies. Britton and Brown designate ...

— The Fern Lover's Companion - A Guide for the Northeastern States and Canada • George Henry Tilton

... of Marcellus is on the traveller's way home to lunch; but he will always be passing the segment of its arcaded wall, filled in with mediaeval masonry; and he need not stop, especially if he has his cab by the hour, for there is nothing more to be seen of the circus. A glimpse, through overhanging foliage, of the steps to the Campidoglio, with Castor and Pollux beside their ...

— Roman Holidays and Others • W. D. Howells

... at the Old Camp and the Naval battery on Cove Hill, when one of the shells ricocheted off the hill-top, and plunged into the Lancers' camp at the foot. Four officers were hit, including the colonel, who had a bit of finger blown off, and a segment through both legs. A sergeant lost an eye. One officer ducked his head and got a fragment straight through his helmet. The shell was a chance shot, but that made it no better. The men are sick of being shot at like rabbits, and ...

— Ladysmith - The Diary of a Siege • H. W. Nevinson

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