lunular, a. and n. Geom.
(ˈl(j)uːnjʊlə(r))
Also 6 (as n.; ? mod.L.) lunulare.
[f. lunula + -ar.]
A. adj. Pertaining to a lune or lunule; in the form of a lunule, crescent-shaped.
| 1727–51 Chambers Cycl. s.v. Angle, Lunular Angle..is that formed by the intersection of two curve lines; the one concave, and the other convex. 1740 Anderson in Rigaud Corr. Sci. Men (1841) I. 363 There is no need of the proportion of the arches..in order to measure the lunular segment. 1788 T. Taylor Proclus I. 168 Two circumferences, either making angles, as in the lunular figure, or [etc.]. 1797 Encycl. Brit. (ed. 3) III. 442/2 (Botany) The figure of Similitudes is..Lunular, crescent-shaped, subrotund. |
† B. n. A crescent-shaped figure. Obs.
| 1570 Dee Math. Pref. a iij b, A perfect Square,..Lunular, Ryng, Serpentine [etc.]. 1579 Digges Stratiot. 104 Causing them..to change from Triangle to Square, from Circulare to Lunulare. 1674 S. Jeake Arith. (1696) 12 The Lunular Decrescent is the sign of the Quotient of any Division. 1789 T. Taylor Proclus II. 44 In lunulars and systroides. |