כּוֹבַע, helmet, turban. Ber. 24ᵃ מניחן בכ׳ וכ׳ let him put them (the T’fillin) into the turban under his pillow. Gitt. 14ᵇ (of the Persians) כּוֹבְעָן אמה their turban is one cubit high; a. e.—Pl. כּוֹבְעִים, כּוֹבְעִין. Gen. R. s. 99 לובשי כ׳ wearing helmets. Y. Gitt. I, end, 43ᵈ; Y. Kidd. III, 64ᵃ bot. כּוֹבְעֵיהֶן אמה (v. supra).—Trnsf. the thyroid cartilage, Adam’s apple. Ḥull. 19ᵃ משיפוי כ׳ וכ׳ from where the thyroid cartilage begins to protrude and downward.