תְּקוּפָה f. (b. h.; קוּף) turn, cycle. Ber. 59ᵇ בתְקוּפָתָהּ, v. חַמָּה. R. Hash. 8ᵃ (Tosaf. pl.); a. e.—Esp. turn of the sun, solstice; תְּקוּפַת ניסן vernal equinox; ת׳ תמוז summer solstice; ת׳ תשרי autumnal equinox; ת׳ טבת winter solstice. Erub. 56ᵃ. Snh. 11ᵇ; Tosef. ib. II, 2 על שלשה … ועל הת׳ we declare a leap-year for three reasons: on account of the spring crop, on account of the fruits of the trees, and on account of the solstice; a. fr.—Pl. תְּקוּפוֹת. Ab. III, 18 ת׳ the calculation of cycles (astronomy), v. פַּרְפֶּרֶת. Sabb. 75ᵃ היודע לתשב ת׳ ומזלות וכ׳ he who understands the science of cycles and planets and does not practice it; a. e.