retardentn.adj.

Brit.

/rᵻˈtɑːd(ə)nt/, U.S.

/rəˈtɑrdənt/,

/riˈtɑrdənt/

Origin: Formed within English, by derivation. Etymons: retard v., -ent suffix.

Etymology: < retard v. + -ent suffix. Compare earlier retardant n., retardant adj.

A. n.

= retardant n.

ΘΚΠ

the world > action or operation > difficulty > hindrance > types or manners of hindrance > [noun] > hindering or retarding > capacity to retard fire, etc. > substance which retards some phenomenon

retardant1824

retardent1858

1858 T. Sutton Dict. Photogr. 57 Citric acid is a powerful retardent to the reduction of silver salts by means of a developer.

1885 Jrnl. Franklin Inst. Jan. 29 I incline to the belief that one rope even acts as a retardent to the others.

1900 Appletons' Pop. Sci. Monthly Feb. 508/1 Materials which are not good as heat retardents.

1925 T. M. Rector Sci. Preserv. Food i. 13 Flesh foods..are comparatively free of substances, such as acids and acid salts, which might act as retardents of spoilage by micro-organisms.

2009 Vancouver Province (Nexis) 3 June a20 The wooden walls contained no drywall, which acts as a fire retardant, allowing the extremely dry timber to ignite quickly.

B. adj.

= retardant adj.

ΘΚΠ

the world > action or operation > difficulty > hindrance > types or manners of hindrance > [adjective] > hindering or retarding > specific fire, heat, etc.

retardent1881

retardant1900

1881 J. Albee Lit. Art 104 Of these two mannerisms, the sententious and the effusive, the former flows like a full bottle with a gurgling, retardent motion.

1900 Nature 16 Aug. 376/1 The necessity of applying fire retardent material in at least two thicknesses.

1948 A. E. Bailey Cottonseed & Cottonseed Products xxiii. 883 Ammonium sulfate and similar fire-retardent compounds may be used to fireproof the hulls.

2009 Fenland Citizen (Nexis) 25 Mar. While the woodchip is flame retardent, fire could still damage equipment.

This entry has been updated (OED Third Edition, March 2010; most recently modified version published online March 2022).

单词	retardent
释义	retardentn.adj. Brit. /rᵻˈtɑːd(ə)nt/, U.S. /rəˈtɑrdənt/, /riˈtɑrdənt/ Origin: Formed within English, by derivation. Etymons: retard v., -ent suffix. Etymology: < retard v. + -ent suffix. Compare earlier retardant n., retardant adj. A. n. = retardant n. ΘΚΠ the world > action or operation > difficulty > hindrance > types or manners of hindrance > [noun] > hindering or retarding > capacity to retard fire, etc. > substance which retards some phenomenon retardant1824 retardent1858 1858 T. Sutton Dict. Photogr. 57 Citric acid is a powerful retardent to the reduction of silver salts by means of a developer. 1885 Jrnl. Franklin Inst. Jan. 29 I incline to the belief that one rope even acts as a retardent to the others. 1900 Appletons' Pop. Sci. Monthly Feb. 508/1 Materials which are not good as heat retardents. 1925 T. M. Rector Sci. Preserv. Food i. 13 Flesh foods..are comparatively free of substances, such as acids and acid salts, which might act as retardents of spoilage by micro-organisms. 2009 Vancouver Province (Nexis) 3 June a20 The wooden walls contained no drywall, which acts as a fire retardant, allowing the extremely dry timber to ignite quickly. B. adj. = retardant adj. ΘΚΠ the world > action or operation > difficulty > hindrance > types or manners of hindrance > [adjective] > hindering or retarding > specific fire, heat, etc. retardent1881 retardant1900 1881 J. Albee Lit. Art 104 Of these two mannerisms, the sententious and the effusive, the former flows like a full bottle with a gurgling, retardent motion. 1900 Nature 16 Aug. 376/1 The necessity of applying fire retardent material in at least two thicknesses. 1948 A. E. Bailey Cottonseed & Cottonseed Products xxiii. 883 Ammonium sulfate and similar fire-retardent compounds may be used to fireproof the hulls. 2009 Fenland Citizen (Nexis) 25 Mar. While the woodchip is flame retardent, fire could still damage equipment. This entry has been updated (OED Third Edition, March 2010; most recently modified version published online March 2022). < n.adj.1858
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