Danielln.

Brit.

/ˈdanjəl/, U.S.

/ˈdænjəl/

Etymology: < the name of John Frederic Daniell, English physicist (1790–1845).

a. Used attributively or in the possessive to designate inventions of Daniell or their modifications, as Daniell battery n. (or Daniell's battery, Daniell cell, Daniell's cell) a cell in which the cathode is zinc in either dilute sulphuric acid or a solution of zinc sulphate and the anode is copper in a saturated solution of copper sulphate, with the zinc sulphate solution either floating on top of the copper sulphate solution or separated from it by a porous plate; also Daniell's hygrometer.

ΚΠ

1840 Philos. Trans. (Royal Soc.) 130 i. 191 Five cells of Professor Daniell's constant battery were charged and connected with the electro-magnetic machine.

1842 G. W. Francis Dict. Arts Daniell's Constant Galvanic Battery.

1863 E. Atkinson tr. A. Ganot Elem. Treat. Physics vi. vi. 269 There are many sources of error in Daniell's hygrometer.

1863 E. Atkinson tr. A. Ganot Elem. Treat. Physics vi. x. i. 609 The current produced by a Daniell's battery is constant for some hours.

1873 F. Jenkin Electr. & Magn. xi. § 9 In the galvanic cell known as Daniell's cell, the electrodes are copper and zinc.

1884 F. Krohn tr. G. Glaser de Cew Magneto- & Dynamo-electr. Machines 233 If the instrument were always graduated with a Daniell cell.

1902 Encycl. Brit. XXVI. 735/1 In cells of the Daniell type.

1948 S. Glasstone Textbk. Physical Chem. (ed. 2) xii. 934 In the familiar Daniell cell..the metallic zinc at the left-hand electrode passes into solution as zinc ions, liberating two electrons.

1955 H. L. Penman Humidity iv. 28 Daniell's hygrometer (1827), where the cooling is produced by forced evaporation of ether.

1957 Encycl. Brit. III. 216/1 The Daniell cell has an open-circuit voltage of about 1·08.

b. Used elliptically for Daniell cell (Daniell battery n. at sense a).

ΚΠ

1871 Eng. Mechanic 430/2 The improved Daniell devised by me.

1878 Encycl. Brit. VIII. 93/2 The sawdust Daniell, invented by Sir Wm. Thomson (1858), is very convenient when portability is desired.

1922 R. Glazebrook Dict. Appl. Physics II. 70/2 Kelvin's tray battery, which is a form of gravity Daniell, has been largely used in submarine telegraphy.

c. A unit of electricity equal to 1.124 volts.

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

单词	daniell
释义	Danielln. Brit. /ˈdanjəl/, U.S. /ˈdænjəl/ Etymology: < the name of John Frederic Daniell, English physicist (1790–1845). a. Used attributively or in the possessive to designate inventions of Daniell or their modifications, as Daniell battery n. (or Daniell's battery, Daniell cell, Daniell's cell) a cell in which the cathode is zinc in either dilute sulphuric acid or a solution of zinc sulphate and the anode is copper in a saturated solution of copper sulphate, with the zinc sulphate solution either floating on top of the copper sulphate solution or separated from it by a porous plate; also Daniell's hygrometer. ΚΠ 1840 Philos. Trans. (Royal Soc.) 130 i. 191 Five cells of Professor Daniell's constant battery were charged and connected with the electro-magnetic machine. 1842 G. W. Francis Dict. Arts Daniell's Constant Galvanic Battery. 1863 E. Atkinson tr. A. Ganot Elem. Treat. Physics vi. vi. 269 There are many sources of error in Daniell's hygrometer. 1863 E. Atkinson tr. A. Ganot Elem. Treat. Physics vi. x. i. 609 The current produced by a Daniell's battery is constant for some hours. 1873 F. Jenkin Electr. & Magn. xi. § 9 In the galvanic cell known as Daniell's cell, the electrodes are copper and zinc. 1884 F. Krohn tr. G. Glaser de Cew Magneto- & Dynamo-electr. Machines 233 If the instrument were always graduated with a Daniell cell. 1902 Encycl. Brit. XXVI. 735/1 In cells of the Daniell type. 1948 S. Glasstone Textbk. Physical Chem. (ed. 2) xii. 934 In the familiar Daniell cell..the metallic zinc at the left-hand electrode passes into solution as zinc ions, liberating two electrons. 1955 H. L. Penman Humidity iv. 28 Daniell's hygrometer (1827), where the cooling is produced by forced evaporation of ether. 1957 Encycl. Brit. III. 216/1 The Daniell cell has an open-circuit voltage of about 1·08. b. Used elliptically for Daniell cell (Daniell battery n. at sense a). ΚΠ 1871 Eng. Mechanic 430/2 The improved Daniell devised by me. 1878 Encycl. Brit. VIII. 93/2 The sawdust Daniell, invented by Sir Wm. Thomson (1858), is very convenient when portability is desired. 1922 R. Glazebrook Dict. Appl. Physics II. 70/2 Kelvin's tray battery, which is a form of gravity Daniell, has been largely used in submarine telegraphy. c. A unit of electricity equal to 1.124 volts. This entry has not yet been fully updated (first published 1933; most recently modified version published online March 2022). < n.1840
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