κεραία,
poetry κεν-αίη, ἡ, (κέρας) horn, [[ 2nd c.BC: Nicander Epicus “Theriaca” 36, 3rd c.AD: Oppianus Apamensis Epicus “Cynegetica” 3.476. ] Refs 2nd c.BC+]
__2 antennae of the crayfish or of insects, [[ 4th c.BC: Aristoteles Philosophus “Historia Animalium” 526a6. 532a26. ] Refs 4th c.BC+]
__II anything projecting like a horn: hence,
__II.1 yard-arm, [[ 4th-5th c.BC: Aeschylus Tragicus “Eumenides” 557 (Lyric poetry), 5th c.BC: Thucydides Historicus 7.41, “IG” 22.657, 1604.17, “PMagd.” 11.4 (3rd c.BC)] Refs 5th c.BC+], etc.; κ. καθελέσθαι, ὑφιέναι, i.e.lower sail, [[ 2nd c.BC: Polybius Historicus 14.10.11, 1st-2nd c.AD: Plutarchus Biographus et Philosophus 2.169b; opposed to ἐντείνασθαι Callias Epigrammaticus “anonymous fragment” 382; ἀπὸ ψιλῆς τῆς κ. 'under bare poles', 2nd c.AD: Lucianus Sophista “Tox.” 19. ] Refs 2nd c.BC+]
__II.1.b projecting beam of a crane, etc., [[ 5th c.BC: Thucydides Historicus 2.76, compare 4.100, “IG” 11(2).161 A 90 (Delos, 3rd c.BC), 3rd-2nd c.BC: Philo Mechanicus “(Belopoeica) Excerpte aus Philons Mechanik - Ath. Berl. Akad.” 100.18, 2nd c.BC: Polybius Historicus 8.5.10, 2nd c.AD: Arrianus Historicus “Anabasis” 2.19.2. ] Refs 5th c.BC+]
__II.1.c projecting parts of the hucklebone, [[ 4th c.BC: Aristoteles Philosophus “Historia Animalium” 499b30. ] Refs 4th c.BC+]
__II.1.d branching stake of wood, used as a pale in a palisade, [[ 2nd c.BC: Polybius Historicus 18.18.7, 2nd c.AD: Appianus Historicus “Bella Civilia” 4.78. ] Refs 2nd c.BC+]