| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a scrap or morsel of food left at a meal. |
myelencephalon my·e·len·ceph·a·lon (mī'ə-lěn-sěf'ə-lŏn')
n.
The posterior portion of the embryonic hindbrain, from which the medulla oblongata develops.