Met`a*ster"num\, n. [Pref. meta- + sternum.]

1. (Anat.) The most posterior element of the sternum; the ensiform process; xiphisternum.

2. (Zo["o]l.) The ventral plate of the third or last segment of the thorax of insects.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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