2 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Sternum \Ster"num\, n.; pl L. {Sterna}, E. {Sternums}. [NL.,
from Gr ?, the breast, chest.]
1. (Anat.) A plate of cartilage, or a series of bony or
cartilaginous plates or segments, in the median line of
the pectoral skeleton of most vertebrates above fishes;
the breastbone.
Note: The sternum is connected with the ribs or the pectorial
girdle, or with both In man it is a flat bone, broad
anteriorly, narrowed behind, and connected with the
clavicles and the cartilages of the seven anterior
pairs of ribs. In most birds it has a high median keel
for the attachment of the muscles of the wings.
2. (Zo["o]l.) The ventral part of any one of the somites of
an arthropod.
From WordNet r 1.6 [wn]:
sternum
n : the flat bone that articulates with the clavicles and the
first seven pairs of ribs [syn: {breastbone}]
more about sternum
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