hydromancy


hydromancy
hy•dro•man•cy
[[t]ˈhaɪ drəˌmæn si[/t]] n.
divination by means of the motions or appearance of water
Etymology: 1585–95; earlier hydromantie, -cie (< MF) « LGk hydromanteía divination by water. See hydro- I, -mancy hy′dro•man`cer, n. hy`dro•man′tic, adj.

From formal English to slang. 2014.