axonn.

Brit.

/ˈaksɒn/, U.S.

/ˈækˌsɑn/

Forms: Also axone, plural axones.

Etymology: < Greek ἄξων axis.

Anatomy.

†1. The body axis. Obsolete.

ΘΚΠ

the world > life > the body > positions or directions in body > [noun] > axis of body

axis1820

plane1830

axon1842

1842 R. Dunglison Med. Lexicon (ed. 3) Axon, axis.

1884 Wilder in N.Y. Med. Jrnl. 2 Aug. 113 Axon, the mesal, longitudinal skeletal axis, represented in Branchiostoma and embryos by a membrano-gelatinous notochord.

2. A filamentous process of a nerve cell carrying outgoing nerve impulses, usually single and often very long, in contrast to the multiple, branched, and short incoming fibres or dendrites: the essential constituent of most nerves.

ΘΚΠ

the world > life > the body > nervous system > substance of nervous system > [noun] > nerve cell > parts of

axon1842

cell body1851

neuron1893

neurite1894

neuroplasm1894

perikaryon1897

neurofibril1898

axon hillock1899

telodendrion1899

axoplasm1900

neurofibrilla1902

cyton1910

soma1947

neurotubule1948

neurofilament1955

neurode1987

1842 R. Dunglison Med. Lexicon (ed. 3) Axon, axis.

1899 L. Hill Man. Human Physiol. xxix. 337 Each [nerve-]fibre consists of a soft central strand of protoplasmic substance called the axon or axis cylinder.

1902 Encycl. Brit. XXV. 394/1 A neurone consists of three parts..(2) A single filament or axon, starting from the perikaryon.

1940 R. S. Woodworth Psychol. (ed. 12) viii. 250 Most nerve cells have two kinds of branches, a single axon and many dendrites.

Derivatives

aˈxonic adj.

ΘΚΠ

the world > life > the body > nervous system > substance of nervous system > [adjective] > nerve cell > parts of

neurofibrillar1902

neurofibrillary1902

neuroplasmic1909

axonic1939

neuritic1967

somal1967

1939 Nature 23 Sept. 557/2 Such an axonic fusion is a most unusual feature in animals.

Draft additions June 2003

axon hillock n. a cone-shaped projection which links the body of a neuron to its axon and acts as a site for the generation of nerve impulses.

ΘΚΠ

the world > life > the body > nervous system > substance of nervous system > [noun] > nerve cell > parts of

axon1842

cell body1851

neuron1893

neurite1894

neuroplasm1894

perikaryon1897

neurofibril1898

axon hillock1899

telodendrion1899

axoplasm1900

neurofibrilla1902

cyton1910

soma1947

neurotubule1948

neurofilament1955

neurode1987

1899 L. F. Barker Nerv. Syst. & Constituent Neurones x. 111 The axone itself..is entirely free from the stainable substance of Nissl, as is also the portion of the cell body immediately adjacent, known as the axone hillock.

1934 A. Forbes in C. Murchison Handbk. Gen. Exper. Psychol. i. iii. 189 We might then conceive of the formation of the mediator in the cell body and the initiation of the motor nerve impulse at the axon hillock.

1966 Nature 3 Sept. 1102/2 The most striking electron microscopical feature of the axon hillock is the denseness of the surface... This effect is due to the close packing and alignment of neurofilaments.

1989 B. Alberts et al. Molecular Biol. Cell (ed. 2) xix. 1088 The membrane of the axon hillock is where action potentials are initiated, and Na⁺ channels are plentiful there.

This entry has not yet been fully updated (first published 1933; most recently modified version published online December 2021).

单词	axon
释义	axonn. Brit. /ˈaksɒn/, U.S. /ˈækˌsɑn/ Forms: Also axone, plural axones. Etymology: < Greek ἄξων axis. Anatomy. †1. The body axis. Obsolete. ΘΚΠ the world > life > the body > positions or directions in body > [noun] > axis of body axis1820 plane1830 axon1842 1842 R. Dunglison Med. Lexicon (ed. 3) Axon, axis. 1884 Wilder in N.Y. Med. Jrnl. 2 Aug. 113 Axon, the mesal, longitudinal skeletal axis, represented in Branchiostoma and embryos by a membrano-gelatinous notochord. 2. A filamentous process of a nerve cell carrying outgoing nerve impulses, usually single and often very long, in contrast to the multiple, branched, and short incoming fibres or dendrites: the essential constituent of most nerves. ΘΚΠ the world > life > the body > nervous system > substance of nervous system > [noun] > nerve cell > parts of axon1842 cell body1851 neuron1893 neurite1894 neuroplasm1894 perikaryon1897 neurofibril1898 axon hillock1899 telodendrion1899 axoplasm1900 neurofibrilla1902 cyton1910 soma1947 neurotubule1948 neurofilament1955 neurode1987 1842 R. Dunglison Med. Lexicon (ed. 3) Axon, axis. 1899 L. Hill Man. Human Physiol. xxix. 337 Each [nerve-]fibre consists of a soft central strand of protoplasmic substance called the axon or axis cylinder. 1902 Encycl. Brit. XXV. 394/1 A neurone consists of three parts..(2) A single filament or axon, starting from the perikaryon. 1940 R. S. Woodworth Psychol. (ed. 12) viii. 250 Most nerve cells have two kinds of branches, a single axon and many dendrites. Derivatives aˈxonic adj. ΘΚΠ the world > life > the body > nervous system > substance of nervous system > [adjective] > nerve cell > parts of neurofibrillar1902 neurofibrillary1902 neuroplasmic1909 axonic1939 neuritic1967 somal1967 1939 Nature 23 Sept. 557/2 Such an axonic fusion is a most unusual feature in animals. Draft additions June 2003 axon hillock n. a cone-shaped projection which links the body of a neuron to its axon and acts as a site for the generation of nerve impulses. ΘΚΠ the world > life > the body > nervous system > substance of nervous system > [noun] > nerve cell > parts of axon1842 cell body1851 neuron1893 neurite1894 neuroplasm1894 perikaryon1897 neurofibril1898 axon hillock1899 telodendrion1899 axoplasm1900 neurofibrilla1902 cyton1910 soma1947 neurotubule1948 neurofilament1955 neurode1987 1899 L. F. Barker Nerv. Syst. & Constituent Neurones x. 111 The axone itself..is entirely free from the stainable substance of Nissl, as is also the portion of the cell body immediately adjacent, known as the axone hillock. 1934 A. Forbes in C. Murchison Handbk. Gen. Exper. Psychol. i. iii. 189 We might then conceive of the formation of the mediator in the cell body and the initiation of the motor nerve impulse at the axon hillock. 1966 Nature 3 Sept. 1102/2 The most striking electron microscopical feature of the axon hillock is the denseness of the surface... This effect is due to the close packing and alignment of neurofilaments. 1989 B. Alberts et al. Molecular Biol. Cell (ed. 2) xix. 1088 The membrane of the axon hillock is where action potentials are initiated, and Na⁺ channels are plentiful there. This entry has not yet been fully updated (first published 1933; most recently modified version published online December 2021). < n.1842
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