Hydromechanics

Part of speech: noun

Definitions

1. The study of forces and motions in fluids, including both liquid and gas dynamics, and their interactions with solids and each other in various systems
2. A discipline focusing on fluid behavior, incorporating both fluid statics and dynamics, along with the influence of solid surfaces on these fluids
3. The branch of physics that investigates how fluids move and the forces exerted by these fluids in relation to solids and other fluids

Etymology: Hydromechanics is a compound built from two Greek ingredients that were already old when English borrowed them. The first, "hydro-", comes from Greek "hudōr", meaning water, a word that also gives English "hydrant" and "dehydrate" and is ultimately linked to the Indo-European root for water. The second, "mechanics", goes back to Greek "mēkhanē", meaning contrivance or device, which Greek writers used for machines and clever ways of getting around a problem. From it came "mēkhanikos", "of machines," which passed through Latin "mechanicus" into English as "mechanics." The word is simply a modern scientific coinage: "hydro-" is attached to "mechanics" to name the branch of mechanics concerned with liquids. Its meaning is therefore literal, the mechanics of water and other fluids, and it was built by scientists and engineers, not handed down from ancient Greek usage. Ancient Greeks had no such field under this name.