n 1  cap  :  a genus (family Fucaceae) of cartilaginous brown algae used in the kelp industry  2  :  any brown alga of the genus Fucus : broadly  :  any of various brown algae .
 
 
 
Similar sounding terms:  FACS  FICS   fix   focus 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2025.