count noun 
(also countable noun)
noun Grammar
A noun that can form a plural and, in the singular, can be used with the indefinite article (e.g. books, a book). Contrasted with mass noun.It's been a long time since I even noticed uses of troop as a count noun meaning ‘soldier’....
- For fear of this, they want to forestall the conversion of certain proper noun trademarks into common count nouns.
- This is borne out by our ways of describing them, using always count nouns rather than mass nouns.
- photosynthetically
- photosynthetic quotient
- photosynthetic ratio
- photosystem
- phototachometer
- phototachymeter
- phototachymetric
- phototactic
- phototaxis
- phototelegram
- phototelegraph
- phototelegraphic
- phototelegraphy
- phototelephony
- photo-telescope
- phototheodolite
- phototherapeutic
- phototherapeutic keratectomy
- phototherapeutics
- phototherapy
- photothermic
- phototimer
- phototonic
- phototopographer
- phototopographic