life testn.

Brit.

/ˈlʌɪf tɛst/, U.S.

/ˈlaɪf ˌtɛst/

Origin: Formed within English, by compounding. Etymons: life n., test n.¹

Etymology: < life n. + test n.¹

A test made on a sample of manufactured products or components in specified operating conditions, either for a certain length of time or until failure occurs, in order to determine their reliability; (also, as a mass noun) testing of this kind (= life testing n. at Derivatives).

ΘΚΠ

the world > action or operation > endeavour > trial or experiment > trial, test, or testing > [noun] > specific tests or testing > test of materials or equipment > of reliability of components

life test1882

life testing1905

1882 J. W. Howell in Van Nostrand’s Engin. Mag. Jan. 58/2 While the economy of a lamp increases with incandescence, its life shortens, but as I have had neither time nor opportunities for life tests, I cannot give data for life at degrees of incandescence.

1893 G. S. Ram Incandescent Lamp xv. 196 A great many carefully-ascertained life tests of different lamps have..been reported.

1958 Biometrika 45 521 A second difficulty encountered in using conventional experimental methods in industrial life tests is the expense and time involved in waiting for all of the test items to fail.

1994 Microelectronics Reliability 34 1899 Each item in a sample of size n is subjected to life test under identical environmental conditions and levels of stress.

2002 W. Boyes Instrumentation Ref. Bk. (ed. 3) xxxii. 744/1 The failure rates of modern components are so low at typical operating temperatures that any life test under these circumstances will involve many thousands of components on test for long periods.

Derivatives

ˈlife testing n. the action or process of carrying out a life test.

ΘΚΠ

the world > action or operation > endeavour > trial or experiment > trial, test, or testing > [noun] > specific tests or testing > test of materials or equipment > of reliability of components

life test1882

life testing1905

1905 Trans. Internat. Electr. Congr. 1904 1 a. 188 He also speaks of lamp life testing accuracy, and refers to 2 per cent.

1957 Ann. Math. Statistics 28 432 Life-testing situations where population properties are of greater interest than sample properties usually involve inanimate objects such as automobile tires, light bulbs, etc.

1986 Jrnl. Power Sources 17 152 (title) BCI cycle life testing procedures for deep-cycle lead-acid batteries.

This entry has been updated (OED Third Edition, September 2009; most recently modified version published online March 2022).

单词	life test
释义	life testn. Brit. /ˈlʌɪf tɛst/, U.S. /ˈlaɪf ˌtɛst/ Origin: Formed within English, by compounding. Etymons: life n., test n.¹ Etymology: < life n. + test n.¹ A test made on a sample of manufactured products or components in specified operating conditions, either for a certain length of time or until failure occurs, in order to determine their reliability; (also, as a mass noun) testing of this kind (= life testing n. at Derivatives). ΘΚΠ the world > action or operation > endeavour > trial or experiment > trial, test, or testing > [noun] > specific tests or testing > test of materials or equipment > of reliability of components life test1882 life testing1905 1882 J. W. Howell in Van Nostrand’s Engin. Mag. Jan. 58/2 While the economy of a lamp increases with incandescence, its life shortens, but as I have had neither time nor opportunities for life tests, I cannot give data for life at degrees of incandescence. 1893 G. S. Ram Incandescent Lamp xv. 196 A great many carefully-ascertained life tests of different lamps have..been reported. 1958 Biometrika 45 521 A second difficulty encountered in using conventional experimental methods in industrial life tests is the expense and time involved in waiting for all of the test items to fail. 1994 Microelectronics Reliability 34 1899 Each item in a sample of size n is subjected to life test under identical environmental conditions and levels of stress. 2002 W. Boyes Instrumentation Ref. Bk. (ed. 3) xxxii. 744/1 The failure rates of modern components are so low at typical operating temperatures that any life test under these circumstances will involve many thousands of components on test for long periods. Derivatives ˈlife testing n. the action or process of carrying out a life test. ΘΚΠ the world > action or operation > endeavour > trial or experiment > trial, test, or testing > [noun] > specific tests or testing > test of materials or equipment > of reliability of components life test1882 life testing1905 1905 Trans. Internat. Electr. Congr. 1904 1 a. 188 He also speaks of lamp life testing accuracy, and refers to 2 per cent. 1957 Ann. Math. Statistics 28 432 Life-testing situations where population properties are of greater interest than sample properties usually involve inanimate objects such as automobile tires, light bulbs, etc. 1986 Jrnl. Power Sources 17 152 (title) BCI cycle life testing procedures for deep-cycle lead-acid batteries. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online March 2022). < n.1882
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