Phosphatidate

Part of speech: noun

Definitions

1. A type of lipid molecule consisting of a glycerol backbone bonded to two fatty acids and a phosphate group, serving as a precursor in membrane and energy metabolism
2. An ester of glycerol with two fatty acid chains and one phosphoric acid group, functioning as a key intermediate in the synthesis of more complex phospholipids
3. A phosphorylated lipid formed from glycerol, fatty acids, and phosphate that acts as a building block for cell membranes and signaling molecules

Etymology: Phosphatidate is a compound built from two pieces of chemistry vocabulary. Its first half, "phosphatide", is itself formed from "phosphate" with the suffix "-ide", a combining form used in chemistry for a class of related compounds, and the second half is the ordinary chemical suffix "-ate", which marks a salt or ester of an acid. Behind "phosphate" lies "phosphorus", borrowed into Latin from Greek "phōsphoros", meaning "light-bearing", from "phôs" (light) and "-phoros" (bearing). The element was named for the glow it gives off, and the chain of suffixes runs from that old Greek image of light to modern laboratory nomenclature. The word is a straightforward piece of scientific coinage rather than a term with a long everyday history. It was assembled deliberately from existing chemical building blocks to name a specific class of molecules, so its meaning is essentially what its parts say: a salt or ester of phosphatidic acid. Its pronunciation and spelling follow the same patterns as the rest of the family, which is why readers who know "phosphate" and "phosphorus" can usually recognise it at a glance.