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Definition os

Etymology 1

From neuter Latin word os (“bone”) (genitive: ossis).

Noun

os (plural ossa)

  1. (rare, medicine) Bone.

Etymology 2

From neuter Latin word os (“mouth”) (genitive: oris).

Noun

os (plural ora)

  1. (rare) A mouth; an opening.
  2. In particular, either end of the cervix, internal (to the uterus) or external (to the vagina).

Etymology 3

Borrowed from Swedish ås.

Noun

os

  1. An osar or esker.

Etymology 4

o +‎ -s.

Noun

os

  1. (rare) plural of o. More commonly oes or o's.

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