Key: "S:" = Show Synset (semantic) relations, "W:" = Show Word (lexical) relations
Display options for sense: (gloss) "an example sentence"
Noun
S: (n) yolk sac, vitelline sac, umbilical vesicle, vesicula umbilicus (membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional)