> as lemmas
orthocycle
orthocycle n. 
/ˈɔrθəˌsaɪk(ə)l/ Geometry (now rare) the circle that is the locus of the intersection of two tangents to a conic that are perpendicular to one another; the director circle.
Brit. /ˈɔːθə(ʊ)ˌsʌɪkl/
, /ˈɔːθə(ʊ)ˌsʌɪkl/U.S. /ˈɔrθoʊˌsaɪk(ə)l/
, /ˈɔrθoʊˌsaɪk(ə)l//ˈɔrθəˌsaɪk(ə)l/ΚΠ
1891 C. Taylor Elem. Geom. Conics (ed. 7) iv. §31 The locus of the point of concourse of a pair of tangents at right angles will be shewn to be a circle, which we shall term the Orthocycle. [Note] It has also been named the Director Circle, since in the parabola it degenerates into the directrix and the line infinity.
1905 Amer. Math. Monthly 12 2 The term director circle..is frequently misapplied to what is more properly called the ortho-cycle; which latter is in no sense a directrix; and merely happens to coincide with it, and the true director circle, in the special case of the parabola.
<
as lemmas
- desert-brown
- desert-cave
- desert-chough
- desert-circle
- desert-dweller
- desert-falcon
- desert-folk
- desert-frequenting
- desert-grey
- desert-haunting
- desert-lark
- desert-lemon
- desert-like
- desert-locked
- desert-long
- desert-pea
- desert-pelican
- desert-ranger
- desert-rod
- desert-ship
- desert-snake
- desert-troop
- desert-wearied
- desert-world
- desert-worn