• (n.) A unit of measure for dynamical effect or work; a foot pound. See Foot pound.
Dy'nam noun [ Confer French dyname . See Dynamic .] A unit of measure for dynamical effect or work; a foot pound. See Foot pound . Whewell. 
The dynam was a term proposed to express a unit of work equal to a weight of 1 Ib raised through 1 foot in a second ; a foot-pound.