a noun designating the whole of which something is a part, ¶11-4-5. The designation of the related part is a (correlative) holonym, ¶15-1-1.

a word that names the whole of which a given word is a part; "`hat' is a holonym for `brim' and `crown'"

The name of the whole of which the meronym names a part. is a holonym of if is a part of .