Kater's reversible pendulum

Kater's reversible pendulum

[′kā·dərz ri¦vər·sə·bəl ′pen·jə·ləm]
(mechanics)
A gravity pendulum designed to measure the acceleration of gravity and consisting of a body with two knife-edge supports on opposite sides of the center of mass.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.