perigean range

perigean range

[¦per·ə¦jē·ən ′rānj]
(oceanography)
The average range of tide at the time of perigean tides, when the moon is near perigee; the perigean range is greater than the mean range.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.