internal organ

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a main organ that is situated inside the body
• Syn:
viscus
• Hypernyms:
organ
• Hyponyms:
viscera, entrails, innards, excretory organ, urinary organ,
liver, heart, pump, ticker, stomach, tummy,
tummy, breadbasket, respiratory organ, intestine, bowel,
gut, hindgut