hypotrochoidn.

/h(a)ɪpəʊˈtrəʊkɔɪd/

/h(a)ɪˈpɒtrəʊkɔɪd/

Etymology: < hypo- prefix 1b + trochoid n. and adj.

Geometry.

The curve described by a point rigidly connected with the centre of a circle which rolls on the inside of another circle.

ΘΚΠ

the world > relative properties > number > geometry > curve > [noun] > generated by or related to a point > by revolution

cycloid1661

epicycloid1696

trochoid1704

involute figure or curve1706

roulette1708

evolute1753

epicycle1756

involute1796

hypocycloid1843

hypotrochoid1843

axoid1876

epicyclic1878

astroid1886

1843 Penny Cycl. XXV. 282/1 A class [of curves] called..hypotrochoids, of which one particular case is the hypocycloid.

1879 W. Thomson & P. G. Tait Treat. Nat. Philos. (new ed.) I: Pt. i. §94 When the tracing point is not in the circumference, we have Epitrochoids and Hypotrochoids.

Derivatives

hypotroˈchoidal adj. of the form of, or pertaining to, a hypotrochoid.

ΘΚΠ

the world > relative properties > number > geometry > curve > [adjective] > other

caustic1728

hypotrochoidal1843

hodographic1847

Pippian1857

tetrazomal1867

trizomal1867

three-bar1875

sinusoidal1878

1843 Penny Cycl. XXV. 283/1 When the convexities are opposed, the trochoidal system is called epi-trochoidal, and when concavity fits convexity, hypo-trochoidal.

This entry has not yet been fully updated (first published 1899; most recently modified version published online December 2019).

单词	hypotrochoid
释义	hypotrochoidn. /h(a)ɪpəʊˈtrəʊkɔɪd//h(a)ɪˈpɒtrəʊkɔɪd/ Etymology: < hypo- prefix 1b + trochoid n. and adj. Geometry. The curve described by a point rigidly connected with the centre of a circle which rolls on the inside of another circle. ΘΚΠ the world > relative properties > number > geometry > curve > [noun] > generated by or related to a point > by revolution cycloid1661 epicycloid1696 trochoid1704 involute figure or curve1706 roulette1708 evolute1753 epicycle1756 involute1796 hypocycloid1843 hypotrochoid1843 axoid1876 epicyclic1878 astroid1886 1843 Penny Cycl. XXV. 282/1 A class [of curves] called..hypotrochoids, of which one particular case is the hypocycloid. 1879 W. Thomson & P. G. Tait Treat. Nat. Philos. (new ed.) I: Pt. i. §94 When the tracing point is not in the circumference, we have Epitrochoids and Hypotrochoids. Derivatives hypotroˈchoidal adj. of the form of, or pertaining to, a hypotrochoid. ΘΚΠ the world > relative properties > number > geometry > curve > [adjective] > other caustic1728 hypotrochoidal1843 hodographic1847 Pippian1857 tetrazomal1867 trizomal1867 three-bar1875 sinusoidal1878 1843 Penny Cycl. XXV. 283/1 When the convexities are opposed, the trochoidal system is called epi-trochoidal, and when concavity fits convexity, hypo-trochoidal. This entry has not yet been fully updated (first published 1899; most recently modified version published online December 2019). < n.1843
随便看	to cook off to cook on the front burner to cook one's goose to cook out to cook rarely do one's goose to cook the books to cook up to cook up a storm to cook with electricity to cook with gas to cook with radar to cool a person's cares to cool it to cool one's chaffer to cool one's coppers to cool one's feet to cool one's heels to cool one's hooves to cool one's jets to cool one's toes to cool or clear one's coppers to cop a feel to cop a mope to cop a nod to cop a packet