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Webster 1913 Edition

(-lĭn)

Adj.

Crepuscular.

[Obs.]

Sprat.

Adj.

Crepuscular. [Not used.]

crepusculine ‎(comparative more crepusculine, superlative most crepusculine)

Obsolete form of crepuscular.
(Can we find and add a quotation of Sprat to this entry?)