So small, trifling, or unimportant as to be not worth considering; insignificant. A Negligible quantity or effect is so minor that it can be disregarded without materially affecting the outcome or conclusion.
The term implies that the thing in question is virtually nonexistent in its impact or influence, allowing for a simplification of calculations or decision-making processes by omitting it from consideration.
TINY SLIM
SCANT
PALTRY
SLENDER MINIMAL
TRIFLING
UNIMPORTANT
INFINITESIMAL INSIGNIFICANT