English
fissirostral
From fissi- + rostral; or else Fissirostres + -al.
Proto-Indo-European *bʰeyd- ‘to split’
Proto-Indo-European *bʰinédti ‘to be splitting’
Proto-Italic *findō ‘to split, cleave’
Latin findō ‘to cleave, split’
Latin fissus ‘cleft’
English fissi-
Proto-Indo-European *Hreh₃d- ‘to scrape, scratch, gnaw’
Latin rōdō ‘to gnaw’
Latin rostrum ‘bill or beak of a bird’
English rostral
Today it means
adj Having the bill cleft beyond the horny part, as in the case of swallows and nightjars.
Language periods are conventional ranges, not dates for this word.
Etymograph / fissirostral