Eclair (noun)

1. A French pastry consisting of a long, thin, cylindrical piece of choux pastry filled with a cream and topped with icing.
2. A long, thin pastry that is filled with cream or custard and topped with chocolate or icing.

Origin:

Late 18th century: french, literally "flash of lightning", from éclairer "to enlighten".

Examples:

1. She ordered a chocolate eclair from the patisserie.
2. Eclairs are a favorite treat at French patisseries.
3. He had never tried an eclair before, but he was pleased with the taste.
4. The eclair was filled with a rich vanilla custard.
5. She couldn't resist the temptation to have an eclair for dessert.