Lewis Short
(adjective) : subsĭcīvus, less correctly subsĕcī-vus (also transp. subcĭsīvus or suc-cĭsīvus), a, um, [sub-seco).
* Lit., as t. t. of the agrimensores, that is cut off and left remaining, in surveying lands.— Subst.: subsĭcīvum, i, n., a remainder or small patch of land, etc.: subsiciva, quae divisis per veteranos agris carptim superfuerunt, etc.,Suet. Dom. 9 fin.; Auct. Rei Agr. ap. Goes. p. 17; 23; 39: mensores nonnumquam dicunt in subsicivum esse unciam agri, etc.,Varr. R. R. 1, 10, 2.
* Transf., of time, that remains over and above the principal occupation, etc.; over-, odd, extra (class.): subsiciva quaedam tempora incurrunt, quae ego perire non patior,spare time, leisure hours, odd hours,Cic. Leg. 1, 3, 9; cf. Plin. H. N. praef. § 18 Sillig: aliquid subsicivi temporis, Plin. Ep. 3, 15, 1: tempora (with subsecundaria), Gell. N. A. praef. § 23: tempus,id. 18, 10, 8: haec temporum velut subsiciva,Quint. 1, 12, 13.
* Of that which is done in extra time, etc., accessory work, over-work: opera, Lucil. ap. Non. 175, 22; so in plur.: subsicivis operis, ut aiunt,Cic. de Or. 2, 89, 364: operae,id. Phil. 2, 8, 20: (philosophia) non est res subsiciva, ordinaria est,i. e. a thing to be attended to at odd times,Sen. Ep. 53, 10.
* In gen., remaining over, occasional, incidental: una tantum subsiciva solicitudo nobis relicta est,App. M. 3, p. 132, 41; 8, p. 212, 9: quam (Italiam) subsicivam Graeciam fecit,id. Mag. p. 294, 23: succisiva proles, Lact. Opif. Dei, 12, 15 Bünem.; Arn. 5, 30: vivacitas illic aeterna est, hic caduca et subsiciva,App. de Deo Socr. 4, p. 44, 7.
Charlton T. Lewis, Charles Short, A Latin Dictionary