preactivatev.

Brit.

/ˌpriːˈaktᵻveɪt/, U.S.

/ˌpriˈæktəˌveɪt/

Origin: Formed within English, by derivation. Etymons: pre- prefix, activate v.

Etymology: < pre- prefix + activate v. Compare earlier preactivated adj., preactivation n.

transitive. To activate or put into effect beforehand. Also: to pretreat with an activator.

ΚΠ

1953 [see preactivating n. at Derivatives].

1958 J. S. Bruner in D. C. Beardslee & M. Wertheimer Readings in Perception lii. 706 The manner in which it is reported is determined by whether the subject has previously been presented with letters or with numbers to recognize. In short, expectancy of one or the other context preactivates a related array of categories or cell-assemblies.

1993 Brit. Jrnl. Orthodontics 20 8/2 Possibly serum ‘pre-activates’ cell membranes making them more responsive to mechanical forces.

2005 Design News (Nexis) 24 Oct. 49 The adhesive has cure delay in the neighborhood of 30 seconds once its been pre-activated by the light. It cures to fixture strength in about three minutes.

Derivatives

preˈactivating n.

ΚΠ

1953 Amer. Jrnl. Bot. 40 401/2 Chemical activation was usually performed..by ‘pre-activating’ by shaking with furfural for 30 min.

2003 Carbon 41 2217 The catalyst, prepared by pre-activating in an autoclave, oxidizing with HNO₃, loading with CuSO₄ and finally calcining at 700 °C.

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

单词	preactivate
释义	preactivatev. Brit. /ˌpriːˈaktᵻveɪt/, U.S. /ˌpriˈæktəˌveɪt/ Origin: Formed within English, by derivation. Etymons: pre- prefix, activate v. Etymology: < pre- prefix + activate v. Compare earlier preactivated adj., preactivation n. transitive. To activate or put into effect beforehand. Also: to pretreat with an activator. ΚΠ 1953 [see preactivating n. at Derivatives]. 1958 J. S. Bruner in D. C. Beardslee & M. Wertheimer Readings in Perception lii. 706 The manner in which it is reported is determined by whether the subject has previously been presented with letters or with numbers to recognize. In short, expectancy of one or the other context preactivates a related array of categories or cell-assemblies. 1993 Brit. Jrnl. Orthodontics 20 8/2 Possibly serum ‘pre-activates’ cell membranes making them more responsive to mechanical forces. 2005 Design News (Nexis) 24 Oct. 49 The adhesive has cure delay in the neighborhood of 30 seconds once its been pre-activated by the light. It cures to fixture strength in about three minutes. Derivatives preˈactivating n. ΚΠ 1953 Amer. Jrnl. Bot. 40 401/2 Chemical activation was usually performed..by ‘pre-activating’ by shaking with furfural for 30 min. 2003 Carbon 41 2217 The catalyst, prepared by pre-activating in an autoclave, oxidizing with HNO₃, loading with CuSO₄ and finally calcining at 700 °C. This is a new entry (OED Third Edition, March 2007; most recently modified version published online March 2022). < v.1953
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