(n) a compound in which the hydrogen atoms of a hydrocarbon have been replaced by bromine and other halogen atoms; very stable; used in fire extinguishers although it is thought to release bromine that depletes the ozone layer

macrocephalon

(n) maleos, Syn. genus Macrocephalon

metencephalon

(n) the part of the hindbrain that develops into the pons and the cerebellum

myelencephalon

(n) the posterior part of the hindbrain in developing vertebrates; forms the medulla oblongata in adults

neencephalon

(n) the part of the brain having the most recent phylogenetic origin; the cerebral cortex and related parts, Syn. neoencephalon

paleencephalon

(n) the more primitive parts of the brain phylogenetically; most structures other than the cerebral cortex, Syn. palaeencephalon, paleoencephalon

rhinencephalon

(n) a center in the cerebral hemispheres that governs the sense of smell in lower animals; in humans it seems to mediate complex emotional behavior, Syn. olfactory brain

telencephalon

(n) the anterior division of the forebrain; the cerebrum and related parts of the hypothalamus

brain

(n) that part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cord, Syn. encephalon

forebrain

(n) the anterior portion of the brain; the part of the brain that develops from the anterior part of the neural tube, Syn. prosencephalon

hindbrain

(n) the posterior portion of the brain including cerebellum and brainstem, Syn. rhombencephalon

maleo

(n) Celebes megapode that lays eggs in holes in sandy beaches, Syn. Macrocephalon maleo

midbrain

(n) the middle portion of the brain, Syn. mesencephalon

The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)

Cephalon

‖n. (Zool.) The head. [ 1913 Webster ]

Chalon

n. A bed blanket. [ Obs. ] Chaucer. [ 1913 Webster ]

Diencephalon

‖n. [ NL. See Dia-, and Encephalon. ] (Anat.) The interbrain or thalamencephalon; -- sometimes abbreviated to dien. See Thalamencephalon. [ 1913 Webster ]

encephalon

n.; pl. encephala [ NL. See Encephalos. ] (Anat.) The contents of the cranium; the brain. [ 1913 Webster ]

Epencephalon

‖n. [ NL., fr. Gr. 'epi` upon, near + &unr_; brain. ] (Anat.) The segment of the brain next behind the midbrain, including the cerebellum and pons; the hindbrain. Sometimes abbreviated to epen. [ 1913 Webster ]

Halones

‖n. pl. [ NL., fr. Gr. "a`lwn, "a`lwnos, a halo. ] (Biol.) Alternating transparent and opaque white rings which are seen outside the blastoderm, on the surface of the developing egg of the hen and other birds. [ 1913 Webster ]

Mesencephalon

‖n. [ NL. See Meso- and Encephalon. ] (Anat.) The middle segment of the brain; the midbrain. Sometimes abbreviated to mesen. See Brain. [ 1913 Webster ]

Mesocephalon

‖n. [ NL. See Meso-, and Cephalon. ] (Anat.) The pons Varolii. [ 1913 Webster ]

Metencephalon

n. [ Met- + encephalon. ] (Anat.) The posterior part of the brain, including the medulla; the afterbrain. Sometimes abbreviated to meten. [ 1913 Webster ]

Myelencephalon

‖n. [ NL., from Gr. myelo`s marrow + E. encephalon. ] (Anat.) (a) The brain and spinal cord; the cerebro-spinal axis. Sometimes abbreviated to myelencephal. (b) The metencephalon. Huxley. [ 1913 Webster ]

neencephalon

(Anat.) The most recently evolved part of the brain of higher animals. It includes the cerebral cortex and related structures. [ PJC ]

paleencephalon

n. The more primitive parts of the brain phylogenetically; it includes most structures other than the cerebral cortex.
Syn. -- paleoencephalon, palaeoencephalon. [ WordNet 1.5 ]

Postencephalon

n. (Anat.) The metencephalon. [ 1913 Webster ]

Prosencephalon

n. [ NL., fr. Gr. &unr_; toward, near to + E. encephalon. ] [ Sometimes abbreviated to proen. ] (Anat.) (a) The anterior segment of the brain, including the cerebrum and olfactory lobes; the forebrain. (b) The cerebrum. Huxley. [ 1913 Webster ]

Rhinencephalon

‖n.; pl. Rhinencephala [ NL., fr. Gr. "ri`s, "rino`s, the nose + 'egke`falos the brain. ] (Anat.) The division of the brain in front of the prosencephalon, consisting of the two olfactory lobes from which the olfactory nerves arise. [ 1913 Webster ]

☞ The term is sometimes used for one of the olfactory lobes, the plural being used for the two taken together. [ 1913 Webster ]

telencephalon

n. 1. the anterior division of the forebrain; the cerebrum and related parts of the hypothalamus. [ WordNet 1.5 ]

Thalamencephalon

‖n. [ NL. See Thalamus, and Encephalon. ] (Anat.) The segment of the brain next in front of the midbrain, including the thalami, pineal gland, and pituitary body; the diencephalon; the interbrain. [ 1913 Webster ]

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