Circles of longitude

Related to Circles of longitude: Circles of latitude
lesser circles parallel to the ecliptic, diminishing as they recede from it.

See also: Circle

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Circles of longitude are demonstrated in the cases described above and illustrated by Figures 1 and 2.