yolk sac
Word Rarity
Rare
Frequency: Zipf frequency 2.95 in modern English
16
Scrabble Score
7
Letters
1
Syllables
7
Unique Chars
Meaning
noun
A membranous sac attached to an embryo, providing early nourishment in the form of yolk in bony fishes, sharks, reptiles, birds, and primitive mammals.