meronym

The name of a constituent part of, the substance of, or a member of something.

X is a meronym of Y if X is a part of Y.

X is a meronym of Y if X is a substance of Y.

X is a meronym of Y if X is a member of Y.

 

meronym
wing		bird	component-object
mouth		face	component-object
branch		tree	component-object
tree		forest	member-collection
oxygen		air	substance-object
adolescence		growing up	phase-process
paying		shopping	feature activity

see holonym (the inverse relation)