noun
indigestible materials; undigested matter
Technical term used in medical, biological, or dietary contexts to refer to substances that cannot be digested.
食物繊維は不消化物として腸を刺激する。
Dietary fiber stimulates the intestines as indigestible material.
胃の中に不消化物が残っている。
Undigested matter remains in the stomach.
Refers to the condition of indigestion, whereas 不消化物 refers to the indigestible substances themselves.
Compound of 不 (negation), 消化 (digestion), and 物 (thing). The exact historical derivation is uncertain, but the word is a straightforward Sino-Japanese technical term.