Dictionary.net

• Lobes or leaf-like processes acting as gills on the back of nudibranch molluscs.

1920 - A dictionary of scientific terms.
By Henderson, I. F.; Henderson, W. D.

• [Greek] Lobes or leaf-like processes acting as gills on back of nudibranch molluscs.

1920 - A dictionary of scientific terms (6th edition)
By J.H. Kenneth