preactivatedadj.

Brit.

/ˌpriːˈaktᵻveɪtᵻd/, U.S.

/ˌpriˈæktəˌveɪdᵻd/

Origin: Formed within English, by derivation. Etymons: pre- prefix, activated adj.

Etymology: < pre- prefix + activated adj.. Compare earlier preactivation n. and later preactivate v.

Activated beforehand; having undergone previous (esp. chemical) activation.

ΚΠ

1937 Proc. Royal Soc. A. 159 224 The lifetime of the preactivated state for such a large molecule may be as great as 10^-8 sec.

1957 Times 11 Oct. 13/7 When the crystals evaporate they may leave behind pre-activated nuclei, which may later seed lower clouds at temperatures only a few degrees above zero.

1988 D. Rees GCSE CDT—Design & Realisation xvi. 164 Resins are normally available as ‘Preactivated’. This means that an activator has been added to the resin to make it cure at room temperature when a catalyst has been added.

2005 Chicago Tribune (Nexis) 20 June 6 The U.S. Patent and Trademark Office issued the following patents recently to Chicago-area companies:..Zipper with preactivated peel seal.

This is a new entry (OED Third Edition, March 2007; most recently modified version published online March 2022).

单词	preactivated
释义	preactivatedadj. Brit. /ˌpriːˈaktᵻveɪtᵻd/, U.S. /ˌpriˈæktəˌveɪdᵻd/ Origin: Formed within English, by derivation. Etymons: pre- prefix, activated adj. Etymology: < pre- prefix + activated adj.. Compare earlier preactivation n. and later preactivate v. Activated beforehand; having undergone previous (esp. chemical) activation. ΚΠ 1937 Proc. Royal Soc. A. 159 224 The lifetime of the preactivated state for such a large molecule may be as great as 10^-8 sec. 1957 Times 11 Oct. 13/7 When the crystals evaporate they may leave behind pre-activated nuclei, which may later seed lower clouds at temperatures only a few degrees above zero. 1988 D. Rees GCSE CDT—Design & Realisation xvi. 164 Resins are normally available as ‘Preactivated’. This means that an activator has been added to the resin to make it cure at room temperature when a catalyst has been added. 2005 Chicago Tribune (Nexis) 20 June 6 The U.S. Patent and Trademark Office issued the following patents recently to Chicago-area companies:..Zipper with preactivated peel seal. This is a new entry (OED Third Edition, March 2007; most recently modified version published online March 2022). < adj.1937
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