Jean le Rond d'Alembert (1717-1783), French philosopher and mathematician

d'Alembert's paradox, a statement concerning inviscid flow

d'Alembert's principle, a statement of the fundamental classical laws of motion

Sandy D'Alemberte (b. 1933), American lawyer and former politician

Ratio test, also known as D'Alembert's test, a test for the convergence of a series

d'Alembert's formula, a mathematical formula

d'Alembert-Euler condition, a mathematical and physical condition

D'Alembert (crater), a lunar impact crater

D'Alembert operator, an operator of the Einstein equation