subˈround,a. [sub- 21 d.] Subrotund. c1789Encycl.Brit. (1797) III. 442/2 The figure of Similitudes is either..Reniform, kidney-shaped, subround [etc.].1863Ann.Nat.Hist.Ser. iii. XII. 263 Acanthocystis turfacea... Globular, subround, of a green colour, loricated.