common name
Definition - A name that is used to designate a class of objects. As opposed to a proper name, which is used to designate a particular individual entity.

1. They are not usually written with initial capital letters.
2. The study of common names, especially when they form terminologies, is called onomasiology.

Example -
dog, book, baseball player, and dictionary

Oxford English Dictionary -
The term's first citation is from 1596:
"Homo is a common name to all men."
(Shakes. 1 Hen. IV, ii. i. 104)

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