eusporangium
- n a sporangium that arises from a group of epidermal cells
eustachian tube
- n either of the paired tubes connecting the middle ears to the nasopharynx; equalizes air pressure on the two sides of the eardrum
eustachio
- n Italian anatomist who was one of the fathers of modern anatomy; noted for descriptions of the ear and the heart (1520-1574)
eustoma
- n small genus of herbs of warm regions of southern North America to northern South America