noun
red-leaf lettuce; lollo rosso
A variety of lettuce with reddish, frilled leaves, often used in salads. The term is a wasei-eigo (Japanese-made English) from 'sunny lettuce'.
wasei-eigo (Japanese-coined English), from sunny lettuce
サニーレタスをサラダに加えると彩りが良くなる。
Adding red-leaf lettuce to a salad makes it more colorful.