The word denticles is a plural noun. A denticle is a small tooth.
tooth or tooth-like part, and dentile.
The denticles are scale like and teethlike, and they help streamline the shark. VROOOM!
No.
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.