nucleolus organiser vs nucleolar organiser

nucleolus organiser and nucleolar organiser both are nouns.

Word	Noun	Adjective	Verb	Adverb
nucleolus organiser	Yes	No	No	No
nucleolar organiser	Yes	No	No	No

As nouns, nucleolus organiser and nucleolar organiser are synonyms defined as:

nucleolus organiser and nucleolar organiser: the particular part of a chromosome that is associated with a nucleolus after nuclear division

Other synonyms of nucleolus organiser include nucleolar organizer, nucleolus organizer.

nucleolus organiser (noun)	nucleolar organiser (noun)
the particular part of a chromosome that is associated with a nucleolus after nuclear division	the particular part of a chromosome that is associated with a nucleolus after nuclear division