A noun that refers to one countable thing is singular.
A noun that stands for one countable portion, part, or unit of some non-countable thing is singulative.
See http://www-01.sil.org/linguistics/GlossaryOfLinguisticTerms/WhatIsASingulative.htm
Nouns that stand for things that one does not count (e.g. water, oil, benevolence) are non-count or mass nouns.
See http://www-01.sil.org/linguistics/GlossaryOfLinguisticTerms/WhatIsAMassNoun.htm
What is the term for a noun that stands for more than one countable portion, part, or unit of some non-countable thing?
[As per a comment below by jlawler, I have edited in the following example from English:]
At the restaurant, it makes sense to speak of a) some beer, b) one beer, c) four beers, and d) beers all around. If a) is semantically non-count and b) has singulative meaning, what term do we use to characterize c) and d)?