i Register
In some senses, nucleobranch is marked as obsolete. Watch for register when choosing this word.
nucleobranch
adj 1noun 1
Definitions
adj
1
Belonging to the Nucleobranchiata, a obsolete order of molluscs that have the gills packed in the shell along with the heart, such sea snails now mostly classified in the order Littorinimorpha.
noun
1
One of the order Nucleobranchiata.
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