n 1  :  something consisting of two identical or similar parts: as  a  :  a lens consisting of two components  b  :  a spectrum line having two close components  2  :  a set of two identical or similar things : esp  :  one of nine pairs of microtubules found in cilia and flagella .
 
 
 
Similar sounding terms:  de·bil·i·ty  tab·let 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2024.