What you're likely thinking of are distributive adjectives. These words describe how something is divided or shared among individuals. Here are some examples:
Each: Each student received a prize.
Every: Every person has a unique fingerprint.
Either: Either option is acceptable.
Neither: Neither of the twins is tall.
Both: Both brothers are doctors.
Any: Any student can join the club.
All: All the guests arrived on time.
These words are used with singular nouns, even if they refer to multiple people or things. For instance, "each student" refers to more than one student, but the noun "student" remains singular.
Let me know if you have any other questions.