forget-me-not Meaning, Definition & Usage

  1. noun small perennial herb having bright blue or white flowers
    mouse ear; Myosotis scorpiodes.

WordNet

For*get"-me-not` noun
Etymology
Cf. G. vergissmeinnicht.
Definitions
  1. (Bot.) A small herb, of the genus Myosotis (M. palustris, incespitosa, etc.), bearing a beautiful blue flower, and extensively considered the emblem of fidelity. ✍ Formerly the name was given to the Ajuga Chamæpitus.

Webster 1913