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The Collaborative International Dictionary
Fissirostral

Fissirostral \Fis`si*ros"tral\, a. [Cf. F. fissirostre.] (Zo["o]l.) Having the bill cleft beyond the horny part, as in the case of swallows and goatsuckers.

Wiktionary
fissirostral

a. Having the bill cleft beyond the horny part, as in the case of swallows and goatsuckers.