Sine

II. Sine ·noun The perpendicular itself. ·see Sine of angle, below.

III. Sine ·noun The length of a perpendicular drawn from one extremity of an arc of a circle to the diameter drawn through the other extremity.

sine
sĭne (old form sē or sēd; v. the foll.), prep. with abl. [si and ne; si, the demonstrative instrum...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
sine
si-ne praep.with abl, without (cf. 2 se): Sine omni periclo, T.: sine imaginibus, sine cantu ...

An Elementary Latin Dictionary