Hȳ-drōg'no-sy, n.
n. [Gr. ὕδωρ, water, and γνῶσις, knowledge.] A treatise pertaining to, or a history and description of, the waters of the earth.
n. [Gr. ὕδωρ, water, and γνῶσις, knowledge.] A treatise pertaining to, or a history and description of, the waters of the earth.