from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An elongated pastry filled with custard or whipped cream and usually iced with chocolate.
French, from Old French esclair, lightning, from esclairier, to light up, from Vulgar Latin *exclāriāre, from Latin exclārāre : ex-, intensive pref.; see ex- + clārus, clear; see kelə-2 in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)