κεφάλαι-ος · kephalai-os — LSJ
of the head: metaph., principal, chief, ῥῆμα κ. (with a play on κεφαλίτης λίθος) Ar. Ra. 854; τὸ κ. μέρος PMasp. 151.16 (vi A.D.): Sup. -ότατος v.l. in Pl. Grg. 494e.
mostly Subst. κεφάλαιον, τό, = κεφαλή, head, parts about the head, esp. of fish, θύννου κ. τοδί Callias Com. 3: in pl., Amphis 35, Sotad.Com. 1.5; also κ. ῥαφανῖδος Ar. Nu. 981; of an infant, Leonid. ap. Aët. 6.1.
chief or main point, κ. δὴ παιδείας λέγομεν τὴν ὀρθὴν τροφήν Pl. Lg. 643c; esp. in speaking or writing, sum, gist of the matter, κεφάλαια λόγων Pi. P. 4.116; κ. τοῦ παντὸς λόγου Men. Georg. 75, cf. Cic. Att. 5.18.1; τὰ κ. συγγράφων Εὐριπίδῃ drawing up the heads of the play, Antiph. 113.5: freq. in Prose, Th. 4.50, Pl. Grg. 453a, etc.; κ. τῶν εἰρημένων Isoc. 3.62, cf. 5.154; κ. τῆς οἰκονομίας Phld. Rh. 1.68 S. (pl.); ἐν κεφαλαίῳ, or ὡς ἐν κ., εἰπεῖν to speak summarily, X. Cyr. 6.3.18, Pl. Smp. 18
metaph., of persons, the head or chief, ὅ τι περ κ. τῶν κάτωθεν, of Pericles, Eup. 93; τὸ κ. οὐδέπω λογίζομαι, τὸν δεσπότην Men. Pk. 173; ὅ τι περ τὸ κ. Luc. Harm. 3, Gall. 24, Philops. 6; τὰ κ. τῶν μαθημάτων, of philosophers, Id. Pisc. 14; τὸ κ. τοῦ πολέμου App. BC 5.50; οἳ τὸ τῆς στάσεως κ. ἦσαν ib. 43; τὸν Θαλῆν τῶν σοφῶν τὸ κ. Jul. Or. 3.125d: hence, of qualities, etc., σχεδόν τι τὸ κ. τῶν κακῶν (sc. avarice) Apollod.Gel. 4; τὸ κ. τῆς εὐδαιμονίας ἡ διάθεσις Diog.Oen. 57.
Rhet., head, topic of argument, D.H. Comp. 1, Rh. 10.5, Str. 1.2.31.
of money, capital, opp. interest or income, Pl. Lg. 742c, D. 27.64, etc.
sum total, IG 1(2).91.23, al., Lys. 19.40, D. 27.10; πολλοῦ κ. for a large sum, Act. Ap. 22.28, cf. Aristeas 24, Plu. Fab. 4, etc.; κ. ἀργυρικά PRyl. 133.15 (i A.D.); also σιτικὰ καὶ ἀργυρικὰ κ. PSI 4.281.31 (ii A.D.).
crown, completion of a thing, τὸ μὲν κ. τῶν ἀδικημάτων the crowning act of wrong, D. 27.7; δύο ταῦτα ὡσπερεὶ κ. ἐφʼ ἅπασι . . ἐπέθηκε Id. 21.18.
chapter, section, PGnom., Prooem. Ammon. in Int. 1.17, al., Chor. in Hermes 17.223; distd. from τίτλος, Suid. s.h.v.