double-actingadj.

Origin: Formed within English, by compounding. Etymons: double adv., acting adj.

Etymology: < double adv. + acting adj. Compare double-action adj. at double adj.¹ and adv. Compounds 2c(a).

Acting in two ways or directions, by two methods, etc.: spec. of a steam-engine, worked by application of steam power on both sides of the piston. (Cf. s.v. double-action adj. at double adj.¹ and adv. Compounds 2c(a).)

ΘΚΠ

society > occupation and work > equipment > machine > machines which impart power > engine > steam engine > [adjective] > specific types

atmospheric1822

single-acting1825

wind-logged1829

non-condensing1839

double-acting1842

treble-cylinder1877

quadruplex1880

uniflow1912

1842 Penny Cycl. XXII. 475 The upward stroke of the piston was now produced by admitting the steam below it..thus the engine became double-acting.

1850 J. Chubb On Constr. Locks & Keys 28 Chubb's detector being combined with the six double-acting tumblers, added very greatly to the security of the lock.

1874 E. H. Knight Pract. Dict. Mech. Double-acting Pump, one which throws water at each stroke.

1892 T. R. Lounsbury Stud. Chaucer I. ii. 155 The assumed relationship..had begun to perform its double-acting part.

This entry has not yet been fully updated (first published 1897; most recently modified version published online December 2020).

单词	double-acting
释义	double-actingadj. Origin: Formed within English, by compounding. Etymons: double adv., acting adj. Etymology: < double adv. + acting adj. Compare double-action adj. at double adj.¹ and adv. Compounds 2c(a). Acting in two ways or directions, by two methods, etc.: spec. of a steam-engine, worked by application of steam power on both sides of the piston. (Cf. s.v. double-action adj. at double adj.¹ and adv. Compounds 2c(a).) ΘΚΠ society > occupation and work > equipment > machine > machines which impart power > engine > steam engine > [adjective] > specific types atmospheric1822 single-acting1825 wind-logged1829 non-condensing1839 double-acting1842 treble-cylinder1877 quadruplex1880 uniflow1912 1842 Penny Cycl. XXII. 475 The upward stroke of the piston was now produced by admitting the steam below it..thus the engine became double-acting. 1850 J. Chubb On Constr. Locks & Keys 28 Chubb's detector being combined with the six double-acting tumblers, added very greatly to the security of the lock. 1874 E. H. Knight Pract. Dict. Mech. Double-acting Pump, one which throws water at each stroke. 1892 T. R. Lounsbury Stud. Chaucer I. ii. 155 The assumed relationship..had begun to perform its double-acting part. This entry has not yet been fully updated (first published 1897; most recently modified version published online December 2020). < adj.1842
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