I. -ˌbath noun
Etymology: International Scientific Vocabulary is- + -bath (from Greek bathos depth); akin to Greek bathys deep — more at bathy-
1. : an imaginary line or a line on a map or chart that connects all points having the same depth below a water surface (as of an ocean, sea, or lake)
2. : a line similar to an isobath indicating depth below the earth's surface of an aquifer or other geological horizon
II. adjective
or iso·bath·ic | ̷ ̷ ̷ ̷|bathik
Etymology: isobath International Scientific Vocabulary is- + -bath (from Greek bathos depth); isobathic from isobath (I) + -ic
: having constant depth