The symbol =, composed of two parallel horizontal lines.

plural of line of sight

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.

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

Auslan; the sign language of the Australian deaf community.

plural of sign-out

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

longsightedness

nearsightedness; myopia

farsightedness