noun
flattened rice cakes
Thin, stretched sheets of mochi, often cut into rectangles and dried. A traditional New Year's food.
お正月にのし餅を焼いて食べます。
We grill and eat flattened rice cakes during the New Year.
のし餅は切り餅よりも薄くて大きいです。
Flattened rice cakes are thinner and larger than cut rice cakes.
From 伸し (のし, noun form of 伸ばす 'to stretch') + 餅 (もち, 'rice cake'), referring to the process of stretching the mochi into a thin sheet.