H. P. Grice, "The Stoa and Athenian dialectic"

Stōĭcus , a, um, adj., = Στωϊκός, I.of or belonging to the Stoic philosophy or to the Stoics, Stoic: “schola,” Cic. Fam. 9, 22 fin.: “secta,” Sen. Ep. 123, 14: “sententia,” id. ib. 22, 7: “libelli,” Hor. Epod. 8, 15: “turba,” Mart. 7, 69, 4: “dogmata,” Juv. 13, 121: “disciplina,” Gell. 19, 1, 1: “Stoicum est,” it is a saying of the Stoics, Cic. Ac. 2, 26, 85: “non loquor tecum Stoicā linguā, sed hac submissiore,” Sen. Ep. 13, 4: “est aliquid in illo Stoici dei: nec cor nec caput habet,” Sen. Apoc. 8.— Subst.: Stōĭcus , i, m., a Stoic philosopher, a Stoic, Cic. Par. praef. § 2; Hor. S. 2, 3, 160; 2, 3, 300; plur., Cic. Mur. 29, 61; and in philosophical writings saepissime.— 2. Stōĭca , ōrum, n. plur., the Stoic philosophy, Cic. N. D. 1, 6, 15.—Adv.: Stōĭcē , like a Stoic, Stoically: “agere austere et Stoice,” Cic. Mur. 35, 74: dicere, id. Par. praef. § 3.