- a circular card with magnets attached to its underside, the face divided on its rim into points of the compass, degrees clockwise from north, or both, and floating or suspended from a pivot so as to rotate freely.
Origin of compass card
First recorded in 1870–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for compass card
A subdivision of the compass-card, equal to 2° 48′ 45″ of the circle.The Sailor's Word-Book
William Henry Smyth
The captain stepped to the binnacle, and read the compass-card.Adventures in Many Lands
He flew mechanically, his head bent down to stare at the compass-card.H.M.S. ----
The compass-card spun round like a teetotum, whirling faster and faster.
At last he laid the glasses down, glanced at the compass-card and walked to the cabin skylight which was open.The Rescue
- a compass in the form of a card that rotates so that "0°" or "North" points to magnetic north