What is "lithium borohydride"

n. (context inorganic compound English) The strong reducing agent LiBH₄

Lithium borohydride (LiBH) is a tetrahydroborate and known in organic synthesis as a reducing agent for esters. Although less common than the related sodium borohydride, the lithium salt offers some advantages, being a stronger reducing agent and highly soluble in ethers, whilst remaining safer to handle than lithium aluminium hydride.