cos, otis. f.
磨刀石。 — fortitudinis iracundia 加力之怒。— olearis 磨油果之石。
Joaquim Affonso Gonçalves, Lexicon Magnum Latino-Sinicum, 3rd edition (Peking: Typis Congregationis Missionis, 1936 [1st ed. Macau, 1841]). Digitized at Dickinson College, 2023.