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The contents of the cranium; the brain.

The interbrain or thalamencephalon; -- sometimes abbreviated to dien. See Thalamencephalon.

The segment of the brain next behind the midbrain, including the cerebellum and pons; the hindbrain. Sometimes abbreviated to epen.

The middle segment of the brain; the midbrain. Sometimes abbreviated to mesen. See Brain.

The posterior part of the brain, including the medulla; the afterbrain. Sometimes abbreviated to meten.

The metencephalon. Huxley.

The metencephalon.

The anterior segment of the brain, including the cerebrum and olfactory lobes; the forebrain.

The division of the brain in front of the prosencephalon, consisting of the two olfactory lobes from which the olfactory nerves arise.

in front of the midbrain, including the thalami, pineal gland, and pituitary body; the diencephalon; the interbrain.

A prefix from Gr. in; as, encephalon, entomology. See In-.

Pertaining to the encephalon or brain.

The encephalon. In man the encephalos reaches its full size about seven years of age. Sir W. Hamilton.

See Epencephalon.

Pertaining to the epencephalon.

The anterior of the three principal divisions of the brain, including the prosencephalon and thalamencephalon. Sometimes restricted to the prosencephalon only. See Brain.

The posterior of the three principal divisions of the brain, including the epencephalon and metencephalon. Sometimes restricted to the epencephalon only.

See Thalamencephalon.

Of or pertaining to the mesencephalon or midbrain.

The cavity of the mesencephalon; the iter.