English-Thai Dictionary

cycloid

N เส้นโค้ง จาก จุด บน เส้นรอบวง ที่ หมุนรอบ เส้นตรง  เกล็ดปลา ที่ เป็น รูป วง แหวน 

 

Webster's 1828 Dictionary

CYCLOID

n.A geometrical curve on which depends the doctrine of pendulums; a figure made by the upper end of the diameter of a circle, turning about a right line. The genesis of a cycloid may be conceived by imagining a nail in the circumference of a wheel; the line which the nail describes in the air, while the wheel revolves in a right line, is the cycloid.

 

CYCLOIDAL

a.Pertaining or relating to a cycloid; as, the cycloidal space is the space contained between the cycloid and its substance. Or the space contained between the curve or crooked line and the subtense of the figure.

 

Webster's 1913 Dictionary

CYCLOID

Cy "cloid (s "kloid ), n. Etym: [Cyclo- + -oid: cf. F. cycloïde.](Geom.)

 

Defn: A curve generated by a point in the plane of a circle when the circle is rolled along a straight line, keeping always in the same plane.

 

Note: The common cycloid is the curve described when the generating point (p ) is on the circumference of the generating circle; the curtate cycloid, when that point lies without the circumference; the prolate or inflected cycloid, when the generating point (p ) lies within that circumference.

 

CYCLOID

CYCLOID Cy "cloid, a. (Zoöl.)

 

Defn: Of or pertaining to the Cycloidei. Cycloid scale (Zoöl.), a fish scale which is thin and shows concentric lines of growth, without serrations on the margin.

 

CYCLOID

CYCLOID Cy "cloid, n. (Zoöl.)

 

Defn: One of the Cycloidei.

 

CYCLOIDAL

CYCLOIDAL Cy *cloid "al (-al ), a.

 

Defn: Pertaining to, or resembling, a cycloid; as, the cycloidal space is the space contained between a cycloid and its base. Cycloidal engine. See Geometric lathe.

 

CYCLOIDEI

Cy *cloi "de *i (s-kloi "d- ), n. pl. Etym: [NL. , fr. Gr. -oid.] (Zoöl.)

 

Defn: An order of fishes, formerly proposed by Agassiz, for those with thin, smooth scales, destitute of marginal spines, as the herring and salmon. The group is now regarded as artificial.

 

CYCLOIDIAN

CYCLOIDIAN Cy *cloid "i *an (s-kloid "-an ), a. & n. (Zoöl.)

 

Defn: Same as 2d and 3d Cycloid.

 

New American Oxford Dictionary

cycloid

cy cloid |ˈsīˌkloid ˈsaɪklɔɪd | ▶noun Mathematics a curve (resembling a series of arches ) traced by a point on a circle being rolled along a straight line. DERIVATIVES cy cloi dal |sīˈkloidl |adjective ORIGIN mid 17th cent.: from Greek kukloeidēs ‘circular, ’ from kuklos ‘circle. ’

 

Oxford Dictionary

cycloid

cycloid |ˈsʌɪklɔɪd | ▶noun Mathematics a curve (resembling a series of arches ) traced by a point on a circle being rolled along a straight line. DERIVATIVES cycloidal |-ˈklɔɪd (ə )l |adjective ORIGIN mid 17th cent.: from Greek kukloeidēs ‘circular ’, from kuklos ‘circle ’.