from
The Collaborative International Dictionary of English v.0.48
Intermedium \In`ter*me"di*um\, n.; pl. {Intermediums}, L.
{Intermedia}. [NL., neut. of L. intermedius intermediate.]
[1913 Webster]
1. Intermediate space. [R.]
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2. An intervening agent or instrument. --Cowper.
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3. (Anat.) The bone or cartilage between the radiale and
ulnare in the carpus, and between the tibiale and fibulare
in the tarsus. It corresponds to the lunar in the carpus,
and to a part of the astragalus in the tarsus of man and
most mammals.
[1913 Webster]