plural of plus sign

plural of equals sign

The symbol =, composed of two parallel horizontal lines.

plural of equality sign

plural of numero sign

A sign that serves as an abbreviation of the word number. It comprises a capital letter N with a lowercase letter o, the latter typically superscript and sometimes underlined. Examples of numero signs include No., No, №, and Nº.

plural of null sign

(set theory) The sign ∅, associated with empty sets.

plural of sign-out

An instance of signing out; a procedure executed when exiting a facility, ending a computer session, etc.