'Regulus regulus' definitions:

Definition of 'Regulus regulus'

From: WordNet
noun
European kinglet with a black-bordered yellow crown patch [syn: goldcrest, golden-crested kinglet, Regulus regulus]

Definition of 'Regulus regulus'

From: GCIDE
  • Goldcrest \Gold"crest`\ (g[=o]ld"kr[e^]st`), n. (Zool.) The European golden-crested kinglet (Regulus cristatus, or Regulus regulus); -- called also golden-crested wren, and golden wren. The name is also sometimes applied to the American golden-crested kinglet. See Kinglet. [1913 Webster]