Ninetieth

a.	1.	Next in order after the eighty-ninth.
	2.	Constituting or being one of ninety equal parts.
n.	1.	The quotient of a unit divided by ninety; one of ninety equal parts of anything.
	2.	The next in order after the eighty-ninth.

Noun	1.	ninetieth - position 90 in a countable series of things
Adj.	1.	ninetieth - the ordinal number of ninety in counting order Synonyms: 90th

90th, ordinal