Os pubis and Os

Os pubis noun - One of the three sections of the hipbone; together these two bones form the front of the pelvis.

Os and os pubis are semantically related. In some cases you can use "Os" instead a noun phrase "Os pubis".

Os noun - A hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known.

Os pubis and os are semantically related. Sometimes you can replace phrase "Os pubis" with "Os", this terms are similar.