Lewis Short
(adj.adv.adv.) : rŏtundus (rŭt-), a, um, adj. rota
* Wheel-shaped, i. e. round, circular, spherical, rotund (very freq. and class.; cf. teres).
* Lit.: cur ea, quae fuerint juxtim quadrata, procul sint Visa rotunda,Lucr. 4, 502; cf. Cic. Fin. 2, 12, 36: stellae globosae et rotundae,id. Rep. 6, 15, 15: mundum rotundum esse volunt,id. N. D. 1, 10, 24.— Comp.: mundum ita tornavit, ut nihil effici possit rotundius,Cic. Univ. 6; so, bacae,Hor. Epod. 8, 13; cf.: capita rotundiora ... rotundissima,Cels. 8, 1 fin.: locus infimus in rotundo,Cic. Tusc. 5, 24, 69: togae,hanging evenly all round,Quint. 11, 3, 139.— Prov.: diruit, aedificat, mutat quadrata rotundis,i. e. turns every thing upside down,Hor. Ep. 1, 1, 100.
* Trop., round, rounded.
* In gen.: sapiens Fortis et in se ipse totus, teres atque rotundus,Hor. S. 2, 7, 86: illa rotunda et undique circumcisa,Quint. 8, 5, 27.
* In partic., of speech (opp. rough, unpolished), round, well turned, smooth, polished, elegant (in Cic. with quasi or ut ita dicam added; but v.infra, adv. b.): erat verborum et delectus elegans et apta et quasi rotunda constructio,Cic. Brut. 78, 272; cf.: Thucydides praefractior nec satis, ut ita dicam, rotundus,id. Or. 13, 40: Graiis dedit ore rotundo Musa loqui,Hor. A. P. 323; celeris ac rotunda distributio,Quint. 3, 4, 16: rotunda volubilisque sententia,Gell. 11, 13, 4: rotundi numeri (with brevis),id. 17, 20, 4: verba,id. 16, 1, 1.—Hence, adv.: rŏtun-dē. *
* (Acc. to I.) Roundly: ut in orbem quam rotundissime formetur,Col. Arb. 5, 2.—*
* (Acc. to II.) Roundly, smoothly, elegantly: a te quidem apte ac rotunde,Cic. Fin. 4, 3, 7.
Charlton T. Lewis, Charles Short, A Latin Dictionary