'Reactiveness' definitions:

Definition of 'Reactiveness'

From: GCIDE
  • Reactive \Re*act"ive\ (r[-e]*[a^]kt"[i^]v), a. [Cf. F. r['e]actif.] Having power to react; tending to reaction; of the nature of reaction. -- {Re*act"ive*ly}, adv. -- {Re*act"ive*ness}, n. [1913 Webster]