It means congruent. It is NOT 'approximately equal', which would be an equal sigh where BOTH lines are squiggly.
a squiggly equal sign
It is a squiggly equals sign, like this ≈
low coolant
An equal sign with a squiggly line over the top of it.
squiggly then t then t then number sign with a line under it
Possible scorpio sign.
this is and ampersand......&
The Sign of the Crooked Arrow has 192 pages.
The Sign of the Crooked Arrow was created on 1949-01-01.
Vertical squiggly line on a yellow diamond sign. see link
The ISBN of The Sign of the Crooked Arrow is 0-448-08928-9.