An allumette is a thin strip of food, such as potatoes or vegetables, that is usually cut into a matchstick shape before being cooked. It is often used to add a crispy texture to dishes or as a garnish.

Dominique Boutard has written:

'Une allumette entre deux feux'

Batonnet, Julienne, allumette, also know as a matchstick, dice, mince, and brunoise

any puff pastry item made in thin sticks or strips. its the french word for 'matchstick'

Allumette and match or rencontre are French equivalents of the English word "match." Context makes clear whether a source of fire (case 1) or a game (examples 2, 3) suits. The respective pronunciations will be "a-lyoo-met," "match" and "raw-kont" in French.