cathodicadj.

Brit.

/kaˈθɒdɪk/,

/kəˈθɒdɪk/, U.S.

/kəˈθɑdɪk/

Forms: Also kathodic.

Etymology: Formed as cathode n. + -ic suffix.

1. Physiology. Of nerve force: Proceeding from a nerve-centre; efferent.

ΚΠ

1852 M. Hall Diastaltic Nerv. Syst. (May ne).

2. Botany. (Of leaves arranged on the axis spirally.) See quots.

ΚΠ

1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 190 If the spiral winds from right to left, the right edge of the leaves (as you ascend) is called the Kathodic, the left edge the anodic.

1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 199 So that..all the segments are broader on the anodic than on the kathodic side.

1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 238 Between the median and descending, or kathodic lateral bundle.

a. Of or pertaining to a cathode.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electricity > electric polarization > [adjective] > relating to poles > relating to the cathode

minus1789

cathodic1837

cathodal1882

1837 W. Whewell Let. 14 Oct. in S. P. Thompson M. Faraday (1898) iv. 164 As for positive and negative, I do not see why cathodic and anodic should not be used.

1896 Daily News 18 Jan. 5/4 Taking photographs with cathodic rays.

1896 Rev. Rev. (U.S.) Mar. 303 Professor Roentgen provisionally designates his peculiar form of cathodic rays.

1951 Engineering 13 Apr. 443/1 [In corrosion] If the water contains a salt..the products formed..at the cathodic (unattacked) part.. are freely soluble.

b. cathodic protection n. protection of an underground or underwater structure from corrosion by a technique that causes the structure to act as the cathode of an electrolytic cell.

ΚΠ

1931 U.S. Bur. Standards Techn. News Bull. May 52/1 A number of soils..are severely corrosive with respect to the commonly used pipe materials. Four methods of preventing corrosion in these soils have been considered: (1) the surrounding of the pipes by noncorrosive soils transported from other regions; (2) electrical or cathodic protection; [etc.].

1964 Electronics Weekly 18 Nov. 24/3 The cathodic protection equipment..has been installed in a number of naval vessels. Designed to protect the ship's hull against corrosion..the system..sets up a current flow between a set of anodes and the ship's hull, which acts as the cathode.

This entry has not yet been fully updated (first published 1889; most recently modified version published online December 2021).

单词	cathodic
释义	cathodicadj. Brit. /kaˈθɒdɪk/, /kəˈθɒdɪk/, U.S. /kəˈθɑdɪk/ Forms: Also kathodic. Etymology: Formed as cathode n. + -ic suffix. 1. Physiology. Of nerve force: Proceeding from a nerve-centre; efferent. ΚΠ 1852 M. Hall Diastaltic Nerv. Syst. (May ne). 2. Botany. (Of leaves arranged on the axis spirally.) See quots. ΚΠ 1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 190 If the spiral winds from right to left, the right edge of the leaves (as you ascend) is called the Kathodic, the left edge the anodic. 1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 199 So that..all the segments are broader on the anodic than on the kathodic side. 1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 238 Between the median and descending, or kathodic lateral bundle. 3. a. Of or pertaining to a cathode. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electric polarization > [adjective] > relating to poles > relating to the cathode minus1789 cathodic1837 cathodal1882 1837 W. Whewell Let. 14 Oct. in S. P. Thompson M. Faraday (1898) iv. 164 As for positive and negative, I do not see why cathodic and anodic should not be used. 1896 Daily News 18 Jan. 5/4 Taking photographs with cathodic rays. 1896 Rev. Rev. (U.S.) Mar. 303 Professor Roentgen provisionally designates his peculiar form of cathodic rays. 1951 Engineering 13 Apr. 443/1 [In corrosion] If the water contains a salt..the products formed..at the cathodic (unattacked) part.. are freely soluble. b. cathodic protection n. protection of an underground or underwater structure from corrosion by a technique that causes the structure to act as the cathode of an electrolytic cell. ΚΠ 1931 U.S. Bur. Standards Techn. News Bull. May 52/1 A number of soils..are severely corrosive with respect to the commonly used pipe materials. Four methods of preventing corrosion in these soils have been considered: (1) the surrounding of the pipes by noncorrosive soils transported from other regions; (2) electrical or cathodic protection; [etc.]. 1964 Electronics Weekly 18 Nov. 24/3 The cathodic protection equipment..has been installed in a number of naval vessels. Designed to protect the ship's hull against corrosion..the system..sets up a current flow between a set of anodes and the ship's hull, which acts as the cathode. This entry has not yet been fully updated (first published 1889; most recently modified version published online December 2021). < adj.1837
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