intermedium
/ˌɪntəˈmiːdɪəm/noun
(pl. intermedia /-dɪə/)
- Zoology (in tetrapods) a carpal in the centre of the wrist joint, or a tarsal in the centre of the ankle joint【动】居间骨针。
词源
late 16th cent. (denoting an intervening action or performance)： from late Latin， neuter (used as a noun) of Latin intermedius 'intermediate'.