源自梵語 ओष्ठ (oṣṭha) + -ము (-mu)；源自原始印歐語 *h₁oh₁s- (“嘴”)。
ఓష్ఠము • (ōṣṭhamu) ? (複數 ఓష్ఠములు)
“ఓష్ఠము” in Charles Philip Brown (1903) A Telugu-English dictionary, Madras: Promoting Christian Knowledge, page 220
