"conceptual category" is correct and usable in written English.
It is a noun phrase that can be used to refer to a set of ideas, entities, or activities that are related to each other in some logical way. For example, "Many researchers have explored the different conceptual categories involved in understanding language."
As time passes, growing numbers of SF classics fall into this conceptual category.
If pressed, they considered throwing out the hammer; the situation of chopping wood seemed more cogent to them than any conceptual category.
The fact that Tony Smith managed to ensconce himself at an event that clearly didn't have a conceptual category suggests that they were beguiled by his triumph at Hampton Court last year where his garden "In Digestion" won Best in Show in the conceptual category.
The sawhorses erected across Fourteenth Street last week reinstated a conceptual category of New York life that has, in recent years, become almost entirely meaningless: the uptown-downtown divide.
In this case, six exhibitions installed throughout the museum look at drawing from a variety of perspectives and suggest that visitors think about it as a more abstract or conceptual category.
The second observation is that the notion of 'functionings' is a conceptual category that is in itself morally neutral.
These are ideal types, obviously, conceptual categories.
There is no definitive set of conceptual categories for an ideal language to employ.
The Clarks cataloged hundreds of denominal verbs, old and new, organizing them into conceptual categories.
But the show's attempt to fit its exhibits into conceptual categories does not work.
Kant argued that time, space, causation, and substance among other features of reality are innate conceptual categories through which the human mind imposes order on experience.
