troch-, trocho- +
(Greek: that which is round[ed]; a wheel, a disk)
trochophore
1. The small, free-swimming, ciliated aquatic larva of various invertebrates, including certain mollusks and annelids.
2. The free-swimming, pear-shaped, generally translucent larval form of marine annelids, mollusks, and related invertebrates.
2. The free-swimming, pear-shaped, generally translucent larval form of marine annelids, mollusks, and related invertebrates.
Externally it has a prominent circlet of cilia, internally a complete digestive tract, a pair of excretory tubes, muscle and nerve fibers, sense organs, and a band of mesoderm.
trochosphere
A young larval form of many annelids, mollusks, and bryozoans, in which a circle of cilia is developed around the anterior end.
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