An efflorescence on vanilla-pods. See the extract.(noun)
The Century Dictionary (Public Domain)
Use "givre" in a sentence
"The pods of the best varieties are, strangely enough, chocolate-colored, and are flecked with a crystalline substance called givre, or vanillin, a fragrant chemical secreted by the pod lining that gives vanilla its characteristic flavor."
"The country looked beautiful in the bright winter sunshine, the distant forest always in a blue mist, the trees with their branches white with "givre" (hoarfrost), and patches of snow and ice all over the fields."
"Dans un square écarté, morne et couverte de givre, Où se cache un hôtel, aux vieux lions de cuivre; and the hero of the tale, a young French poet, who is in London, is truly unhappy in that village."