noun
light eating; small appetite
Describes a person who habitually eats little or a meal that is light. Often used as a noun or with する to mean 'to eat lightly'.
彼女は小食なので、いつも少ししか食べない。
She has a small appetite, so she always eats only a little.
健康のために小食を心がけている。
I try to eat lightly for my health.
Compound of 小 (small) and 食 (eating). The alternate form 少食 uses a kanji with a similar meaning.