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Meaning of sternum

ster•num

Pronunciation: (stûr'num), [key]
— pl. -na -nums.
  1. a bone or series of bones extending along the middle line of the ventral portion of the body of most vertebrates, consisting in humans of a flat, narrow bone connected with the clavicles and the true ribs; breastbone. See diag. under
  2. the ventral surface of a body segment of an arthropod.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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