noun
stretched dried abalone (betrothal gift)
A traditional Japanese betrothal gift consisting of dried abalone that has been stretched into a long, thin strip. It symbolizes a wish for a long and happy marriage.
結納の品として長熨斗を贈る習慣がある。
There is a custom of presenting stretched dried abalone as a betrothal gift.
熨斗 generally refers to a decorative paper strip attached to gifts, originally representing dried abalone. 長熨斗 specifically denotes the stretched dried abalone itself, used in formal betrothal ceremonies.
From 長 (naga, 'long') + 熨斗 (noshi, 'dried abalone' or 'decorative paper strip'). The stretching of the abalone symbolizes longevity and a lasting marriage.