anodic, a.
(æˈnɒdɪk)
[f. Gr. ἄνοδος way up (f. ἀνά up + ὁδός way) or directly f. anode + -ic.]
1. a. Electr. = anodal a.
| 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. 1844 Noad Lect. Electricity (ed. 2) 200 The anodic division..will finally become colourless, owing to the separation of chlorine. 1853 in Mayne Exp. Lex. 1889 [see A.C.C. s.v. A III]. 1890 Billings Med. Dict. s.v., A[nodic]-closure-contraction,..contraction of a muscle when circuit is closed by placing the anode over the motive-point. A.-opening-contraction,..contraction when circuit is opened by removal of anode from over motive-point. 1943 Electronic Engin. XVI. 170 The operations involved are:..rinsing, anodising, modifying of the anodic film and plating. |
b. anodic bath, the electrolyte in the anodic oxidation process; anodic oxidation, anodic process, anodic treatment, anodizing (see anodize v.).
| 1924 Bengough & Stuart Brit. Pat. 223,995 The invention consists in subjecting a surface of aluminium or aluminium alloy to anodic treatment in an electrolytic bath. 1924 U. R. Evans Corrosion of Metals xi. 185 In the anodic process the recesses always receive adequate covering—no matter where the cathodes are placed. 1926 Engineering 27 Aug. 274/1 The film produced by anodic oxidation in a bath containing a chromate, bichromate, or—best of all—chromic acid, protects the metal..against corrosion. 1932 Jrnl. R. Aeronaut. Soc. Jan. 15 Chromic acid from the anodic bath..might cause trouble. Ibid. 11 In modern anodic oxidation plants stainless steel cathodes are frequently used. |
2. Physiol. Of nerve force: proceeding towards a nerve-centre; afferent. (Cf. cathodic a. 1.)
| 1852 M. Hall Diastaltic Nerv. Syst. 32 The influence which has induced this effect must have been anodic and cathodic in one and the same lumbar nerve. |
3. Bot. (See quot. 1882 s.v. cathodic a. 2.)
Hence aˈnodically adv.
| 1905 J. McCabe tr. Haeckel's Wond. Life 101 Most of the flagellate infusoria..are anodically sensitive or positively galvanotactic. 1932 Jrnl. R. Aeronaut. Soc. Jan. 18 The modern tendency was to make tanks of either duralumin or aluminium, and the Air Ministry required that these should be anodically treated. |