English-Thai Dictionary

trochoid

N เส้นโค้ง รู ปลูกร อก 

 

Webster's 1828 Dictionary

TROCHOID

n.[L. trochus, to run. ] In geometry, a curve generated by the motion of a wheel; the cycloid.

 

Webster's 1913 Dictionary

TROCHOID

Tro "choid, n. Etym: [Gr. -oid; cf. F. trochoïde. See Troche. ] (Geom.)

 

Defn: The curve described by any point in a wheel rolling on a line; a cycloid; a roulette; in general, the curve described by any point fixedly connected with a moving curve while the moving curve rolls without slipping on a second fixed curve, the curves all being in one plane. Cycloids, epicycloids, hypocycloids, cardioids, etc. , are all trochoids.

 

TROCHOID

TROCHOID Tro "choid, a.

 

1. (Anat. )

 

Defn: Admitting of rotation on an axis; -- sometimes applied to a pivot joint like that between the atlas and axis in the vertebral column.

 

2. (Zoöl.)

 

Defn: Top-shaped; having a flat base and conical spire; -- said of certain shells.

 

3. (Zoöl.)

 

Defn: Of or pertaining to the genus Trochus or family Trochidæ.

 

TROCHOIDAL

TROCHOIDAL Tro *choid "al, a.

 

1. (Geom.)

 

Defn: Of or pertaining to a trochoid; having the properties of a trochoid.

 

2. (Anat. & Zoöl.)

 

Defn: See Trochoid, a.

 

New American Oxford Dictionary

trochoid

tro choid |ˈtrōˌkoid ˈtroʊkɔɪd | ▶adjective 1 Anatomy denoting a joint in which one element rotates on its own axis (e.g., the atlas vertebra ). 2 Geometry denoting a curve traced by a point on a radius of a circle rotating along a straight line or another circle (a cycloid, epicycloid, or hypocycloid ). 3 Zoology having or denoting a form of mollusk shell that is conical with a flat base, like a top shell. ▶noun 1 a trochoid curve. 2 a trochoid joint. DERIVATIVES tro choi dal |trōˈkoidl |adjective ORIGIN early 18th cent.: from Greek trokhoeidēs ‘wheellike, ’ from trokhos ‘wheel. ’

 

Oxford Dictionary

trochoid

trochoid |ˈtrəʊkɔɪd | ▶adjective 1 Anatomy denoting a joint in which one element rotates on its own axis (e.g. the atlas vertebra ). 2 Geometry denoting a curve traced by a point on a radius of a circle rotating along a straight line or another circle (a cycloid, epicycloid, or hypocycloid ). 3 Zoology having or denoting a form of mollusc shell which is conical with a flat base, like a top shell. ▶noun 1 a trochoid curve. 2 a trochoid joint. DERIVATIVES trochoidal |-ˈkɔɪd (ə )l |adjective ORIGIN early 18th cent.: from Greek trokhoeidēs ‘wheel-like ’, from trokhos ‘wheel ’.

 

Duden Dictionary

Trochoide

Tro cho i de Substantiv, feminin Mathematik , die |Trocho i de |die Trochoide; Genitiv: der Trochoide, Plural: die Trochoiden spezielle zyklische Kurve, Sonderform der Zykloide