quword
趣词
Word Origins Dictionary
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os (1)
[os 词源字典]
"A bone (used chiefly in Latin names of individual bones, e.g.
os trapezium
)",
Latin
.
[os etymology, os origin, 英语词源]
os (2)
"An opening or entrance to a passage, especially one at either end of the cervix of the womb", Mid 18th century: from
Latin
, 'mouth'.