Sometimes. But it could also stand for the ray or [infinite] line passing through the points A and B.
LENGTH ~
length
The A stands for angle.
It stands for ANGLE SIDE ANGLE
length
length
Length
means sk my dk
The G stands for "Geometry" and "God".
Length
AAA stands for angle-angle-angle SAS stands for side-angle-side and so forth
It most commonly stands for World Health Organisation, though that has nothing to do with geometry.