Wiktionary
tetraphenylborate
n. (context organic chemistry English) The univalent anion B(C6H5)4- containing four phenyl groups attached to a boron atom; any salt containing this anion
Wikipedia
Tetraphenylborate
Tetraphenylborate ( IUPAC name: Tetraphenylboranuide) is an organoboron anion consisting of a central boron atom with four phenyl groups. Salts of tetraphenylborate uncouple oxidative phosphorylation.