n. The portion of the brain composed of the medulla oblongata.
the GNU version of the Collaborative International Dictionary of English
n. The brain and spinal cord; the cerebro-spinal axis. Sometimes abbreviated to myelencephal.
n. The metencephalon.
The Century Dictionary and Cyclopedia
n. The cerebrospinal axis; the brain and spinal cord taken together and considered as a whole.
n. The hindmost segment of the encephalon; the afterbrain or metencephalon, more commonly called the medulla oblongata. See cuts under encephalon and brain. Huxley.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the posterior part of the hindbrain in developing vertebrates; forms the medulla oblongata in adults
Word Usage
"It is customary to divide the rest of the hind-brain into two parts, viz., an upper, called the metencephalon, and a lower, the myelencephalon."