Jacobsonn.

Brit.

/ˈdʒeɪkəbsn/,

/ˈjakəbsn/, U.S.

/ˈdʒeɪkəbs(ə)n/

Etymology: < the name of Ludwig Levin Jacobson (1783–1843), Danish anatomist and physician.

Used in the possessive or with of-adjunct to designate structures investigated by Jacobson, as Jacobson's nerve n. the tympanic nerve, a branch of the glosso-pharyngeal (ninth cranial) nerve. Jacobson's organ n. an organ which is only vestigial in adult man but is a well-developed olfactory organ in many vertebrates, notably snakes and lizards, occurring as (one of) a pair of sacs or tubes in communication with the mouth (or in some cases the nose). Jacobson's reflex n. (see quot. 1913).

ΘΚΠ

the world > life > the body > nervous system > nerve > specific nerves > [noun] > pairs of cranial nerves > specific cranial nerves

optic sinew?c1425

recurrent nerve1578

optic1615

optic nerve1615

recurrent1615

par vagum1666

fourth nerve1681

accessory nerve1682

chorda tympani1807

abducens1809

hypoglossus1811

pneumogastric1826

pneumogastric nerve1827

hypoglossal nerve1828

facial1834

fifth nerve1836–9

vagus1840

vagal nerve1854

vagus nerve1856

Jacobson's nerve1860

oculomotor1868

trigeminus1875

hypoglossal1876

oculimotor1890

pathetic1890

sixth1899

trigeminal1899

the world > life > the body > sense organ > olfactory organ > parts of olfactory organ > [noun]

Schneiderian1746

naris1834

choana1878

postnaris1881

Jacobson's organ1888

osmoceptor1944

1836–9 Todd's Cycl. Anat. & Physiol. II. 495/2 The most important of these is a small branch which proceeds from the ganglion into the tympanum (ramus tympanicus nervi glosso-pharyngei; nerve of Jacobson).

1860 H. Gray Anat. (ed. 2) 524 The tympanic branch (Jacobson's nerve), arises from the petrous ganglion.

1871 T. H. Huxley Man. Anat. Vertebrated Animals ii. 72 In the latter case they are the canals of Stenson... Glandular diverticula of the mucous membrane, supplied with nervous filaments from both the olfactory and the fifth pair, may open into these canals. They are called..the ‘organs of Jacobson’.

1887 Encycl. Brit. XXII. 166/1 In snakes and lizards a second olfactory organ is found embedded between the turbinals and the vomer and is known as ‘Jacobson's organ’.

1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 346 A portion of the nasal cavity becomes separated off from the nose proper. It is known as Jacobson's organ, and is supplied by the fifth nerve as well as by the olfactory.

1888 W. R. Gowers Man. Dis. Nerv. Syst. II. iv. 212 The gangliform enlargement also receives a twig from the nerve (small petrosal) which connects the otic ganglion, through the nerve of Jacobson, with the glosso-pharyngeal.

1896 J. W. Kirkaldy & E. C. Pollard tr. J. E. V. Boas Text Bk. Zool. 333 In some Reptiles and most Mammals, there is a peculiar saccular or tubular paired organ, Jacobson's organ, in close connection with the olfactory apparatus.

1913 W. A. N. Dorland Illustr. Med. Dict. (ed. 7) Jacobson's reflex, a reflex seen in cerebral spastic paralysis of the upper extremities.

1951 C. K. Weichert Anat. Chordates vi. 254 Although the function of Jacobson's organ is obscure, it is believed to aid in the recognition of food, since it is best developed in animals which hold food in their mouths.

1954 T. L. Peele Neuroanat. Basis Clin. Neurol. ix. 217/2 By way of the tympanic branch of the glossopharyngeal (Jacobson's nerve) sensory fibers are supplied to the medial surface of the ear drum, to the tympanic cavity, to the eustachian tube in part, and to mastoid cells.

1965 R. Morris & D. Morris Men & Snakes viii. 195 Snakes, like lizards, possess a..Jacobsen's [sic] Organ. This is a scent-sensitive pair of pits lying in the roof of the mouth.

Derivatives

† Jacobˈsonian adj. (obsolete).

ΘΚΠ

the world > life > the body > sense organ > olfactory organ > [adjective]

postnasal1859

Jacobsonian1878

postrhinal1880

1878 A. Macalister Introd. Systematic Zool. & Morphol. Vertebr. Animals iii. 16 In connexion with this 5th pair [of nerves] there may be six separate ganglia:..5th, Cloquet's, on the Jacobsonian organ.

1889 A. Macalister Text-bk. Human Anat. 634 The Jacobsonian cartilages and the single or septal cartilage.

1893 Gunn & Hensman in H. Morris Treat. Human Anat. vii. 928 In the septal cartilage above the opening of Stenson's canal there is a small pouch which presents a minute opening below. This is the representative of the Jacobsonian organ. A strip of cartilage underneath this..is known as the Jacobsonian cartilage.

This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2022).

单词	jacobson
释义	Jacobsonn. Brit. /ˈdʒeɪkəbsn/, /ˈjakəbsn/, U.S. /ˈdʒeɪkəbs(ə)n/ Etymology: < the name of Ludwig Levin Jacobson (1783–1843), Danish anatomist and physician. Used in the possessive or with of-adjunct to designate structures investigated by Jacobson, as Jacobson's nerve n. the tympanic nerve, a branch of the glosso-pharyngeal (ninth cranial) nerve. Jacobson's organ n. an organ which is only vestigial in adult man but is a well-developed olfactory organ in many vertebrates, notably snakes and lizards, occurring as (one of) a pair of sacs or tubes in communication with the mouth (or in some cases the nose). Jacobson's reflex n. (see quot. 1913). ΘΚΠ the world > life > the body > nervous system > nerve > specific nerves > [noun] > pairs of cranial nerves > specific cranial nerves optic sinew?c1425 recurrent nerve1578 optic1615 optic nerve1615 recurrent1615 par vagum1666 fourth nerve1681 accessory nerve1682 chorda tympani1807 abducens1809 hypoglossus1811 pneumogastric1826 pneumogastric nerve1827 hypoglossal nerve1828 facial1834 fifth nerve1836–9 vagus1840 vagal nerve1854 vagus nerve1856 Jacobson's nerve1860 oculomotor1868 trigeminus1875 hypoglossal1876 oculimotor1890 pathetic1890 sixth1899 trigeminal1899 the world > life > the body > sense organ > olfactory organ > parts of olfactory organ > [noun] Schneiderian1746 naris1834 choana1878 postnaris1881 Jacobson's organ1888 osmoceptor1944 1836–9 Todd's Cycl. Anat. & Physiol. II. 495/2 The most important of these is a small branch which proceeds from the ganglion into the tympanum (ramus tympanicus nervi glosso-pharyngei; nerve of Jacobson). 1860 H. Gray Anat. (ed. 2) 524 The tympanic branch (Jacobson's nerve), arises from the petrous ganglion. 1871 T. H. Huxley Man. Anat. Vertebrated Animals ii. 72 In the latter case they are the canals of Stenson... Glandular diverticula of the mucous membrane, supplied with nervous filaments from both the olfactory and the fifth pair, may open into these canals. They are called..the ‘organs of Jacobson’. 1887 Encycl. Brit. XXII. 166/1 In snakes and lizards a second olfactory organ is found embedded between the turbinals and the vomer and is known as ‘Jacobson's organ’. 1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 346 A portion of the nasal cavity becomes separated off from the nose proper. It is known as Jacobson's organ, and is supplied by the fifth nerve as well as by the olfactory. 1888 W. R. Gowers Man. Dis. Nerv. Syst. II. iv. 212 The gangliform enlargement also receives a twig from the nerve (small petrosal) which connects the otic ganglion, through the nerve of Jacobson, with the glosso-pharyngeal. 1896 J. W. Kirkaldy & E. C. Pollard tr. J. E. V. Boas Text Bk. Zool. 333 In some Reptiles and most Mammals, there is a peculiar saccular or tubular paired organ, Jacobson's organ, in close connection with the olfactory apparatus. 1913 W. A. N. Dorland Illustr. Med. Dict. (ed. 7) Jacobson's reflex, a reflex seen in cerebral spastic paralysis of the upper extremities. 1951 C. K. Weichert Anat. Chordates vi. 254 Although the function of Jacobson's organ is obscure, it is believed to aid in the recognition of food, since it is best developed in animals which hold food in their mouths. 1954 T. L. Peele Neuroanat. Basis Clin. Neurol. ix. 217/2 By way of the tympanic branch of the glossopharyngeal (Jacobson's nerve) sensory fibers are supplied to the medial surface of the ear drum, to the tympanic cavity, to the eustachian tube in part, and to mastoid cells. 1965 R. Morris & D. Morris Men & Snakes viii. 195 Snakes, like lizards, possess a..Jacobsen's [sic] Organ. This is a scent-sensitive pair of pits lying in the roof of the mouth. Derivatives † Jacobˈsonian adj. (obsolete). ΘΚΠ the world > life > the body > sense organ > olfactory organ > [adjective] postnasal1859 Jacobsonian1878 postrhinal1880 1878 A. Macalister Introd. Systematic Zool. & Morphol. Vertebr. Animals iii. 16 In connexion with this 5th pair [of nerves] there may be six separate ganglia:..5th, Cloquet's, on the Jacobsonian organ. 1889 A. Macalister Text-bk. Human Anat. 634 The Jacobsonian cartilages and the single or septal cartilage. 1893 Gunn & Hensman in H. Morris Treat. Human Anat. vii. 928 In the septal cartilage above the opening of Stenson's canal there is a small pouch which presents a minute opening below. This is the representative of the Jacobsonian organ. A strip of cartilage underneath this..is known as the Jacobsonian cartilage. This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2022). < n.1836
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