from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A position of the body at rest in which the spine is curved, the head is bowed forward, and the arms and legs are drawn in toward the chest.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The location of the fetus inside a womb.
- n. A posture in which the head and knees are brought as close to the abdomen as possible.
From its resemblance to the position of a fetus in the womb.(American Heritage® Dictionary of the English Language, Fourth Edition)
From the position a fetus assumes. (Wiktionary)