velocity, v, c
Vector quantity equal to the derivative of the position vector with respect to time (symbols u, v, w for components of c).
Green Book, 2nd ed., p. 11 (
ISO 31-1: 1992 (
PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 997 (