actinen.

Brit.

/ˈaktɪn/,

/ˈaktʌɪn/, U.S.

/ˈækt(ə)n/,

/ˈækˌtaɪn/

Origin: A borrowing from Greek. Etymons: Greek ἀκτῖν-, ἀκτίς.

Etymology: < ancient Greek ἀκτῖν-, ἀκτίς ray (see actino- comb. form). With use in sense 1 compare quot. 1837, and also German †Actine (J. F. W. Herschel 1837, in Ann. der Physik u. Chem. 41 559; now Aktin ). With sense 2 compare hexactine adj. and n. at hexa- comb. form , tetractine adj. and n. at tetract adj. and n. Derivatives, triactine adj. at tri- comb. form 1a(a), etc.

1. A proposed unit of the intensity of solar radiation (see quot. 1837). rare. Now historical.

ΚΠ

1837 J. F. W. Herschel in Mag. Pop. Sci. 3 477/1 Let the term actine be used to express that intensity of solar radiation which would be competent to melt one millionth part of a metre in thickness of a surface of blackened ice, perpendicularly exposed, in one minute of time.

1866 W. C. Wells Ess. Dew App. 141 Finally the result is reduced to actines, or units of solar radiation.

1997 Brit. Jrnl. Hist. Sci. 30 350 He [sc. Herschel] defined a unit for the measure of solar radiation, the ‘actine’.

2. Zoology. Each of the rays or points of a sponge spicule.

ΚΠ

1887 Encycl. Brit. XXII. 416/2 Two actines soldered together by intervening silica.

1911 Encycl. Brit. XXV. 723/1 A hexaster (= rosette) is a perfectly symmetrical hexact whose actines branch out into secondary or terminal rays.

2008 Micron 39 210/2 In triactines the three actines may be oriented in various ways, the simplest being the regular star-shaped spicules.

This entry has been updated (OED Third Edition, November 2010; most recently modified version published online December 2021).

单词	actine
释义	actinen. Brit. /ˈaktɪn/, /ˈaktʌɪn/, U.S. /ˈækt(ə)n/, /ˈækˌtaɪn/ Origin: A borrowing from Greek. Etymons: Greek ἀκτῖν-, ἀκτίς. Etymology: < ancient Greek ἀκτῖν-, ἀκτίς ray (see actino- comb. form). With use in sense 1 compare quot. 1837, and also German †Actine (J. F. W. Herschel 1837, in Ann. der Physik u. Chem. 41 559; now Aktin ). With sense 2 compare hexactine adj. and n. at hexa- comb. form , tetractine adj. and n. at tetract adj. and n. Derivatives, triactine adj. at tri- comb. form 1a(a), etc. 1. A proposed unit of the intensity of solar radiation (see quot. 1837). rare. Now historical. ΚΠ 1837 J. F. W. Herschel in Mag. Pop. Sci. 3 477/1 Let the term actine be used to express that intensity of solar radiation which would be competent to melt one millionth part of a metre in thickness of a surface of blackened ice, perpendicularly exposed, in one minute of time. 1866 W. C. Wells Ess. Dew App. 141 Finally the result is reduced to actines, or units of solar radiation. 1997 Brit. Jrnl. Hist. Sci. 30 350 He [sc. Herschel] defined a unit for the measure of solar radiation, the ‘actine’. 2. Zoology. Each of the rays or points of a sponge spicule. ΚΠ 1887 Encycl. Brit. XXII. 416/2 Two actines soldered together by intervening silica. 1911 Encycl. Brit. XXV. 723/1 A hexaster (= rosette) is a perfectly symmetrical hexact whose actines branch out into secondary or terminal rays. 2008 Micron 39 210/2 In triactines the three actines may be oriented in various ways, the simplest being the regular star-shaped spicules. This entry has been updated (OED Third Edition, November 2010; most recently modified version published online December 2021). < n.1837
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