WordReference Random House Unabridged Dictionary of American English © 2025
parallel′ogram law′,
- Mathematics, Physicsa rule for adding two vectors, as forces (parallel′ogram of forc′es), by placing the point of application of one at the point of origin of the other and obtaining their sum by constructing the line connecting the two remaining end points, the sum being the diagonal of the parallelogram whose adjacent sides are the two vectors.
'parallelogram law' also found in these entries (note: many are not synonyms or translations):