Emily Dickinson Lexicon

COR-US-CA'TION, n. [L. coruscatio.]

1. A flash; a sudden burst of light in the clouds or atmosphere. – Bacon.
2. The light produced by the combustion of inflammable gas in the earth. – Newton. Artificial coruscations are produced by phosphorus and sulpharic acid, or by sulphuric acid and iron filings. – Encyc.