| ROSTRAL | • rostral adj. (Anatomy) Relating to the rostrum. • rostral adj. Serving as a rostrum.
 • rostral n. A scale in reptiles on the median plate of the tip of the snout that borders the mouth opening.
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| COLOSTRAL | • colostral adj. Relating to colostrum. • COLOSTRAL adj. relating to colostrum, also COLOSTRIC, COLOSTROUS.
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| ROSTRALLY | • rostrally adv. In a rostral direction. • rostrally adv. With regard to a rostrum (beak).
 • ROSTRAL adv. of or like a rostrum, a spike on prow of warship for ramming.
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| CONIROSTRAL | • conirostral adj. (Zoology) Belonging to the tribe Conirostres of perching birds with strong conical beaks. • CONIROSTRAL adj. having a strong conical beak, like e.g. most finches.
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| LATIROSTRAL | • LATIROSTRAL adj. having a broad beak, also LATIROSTRATE. | 
| CURVIROSTRAL | • curvirostral adj. (Zoology) Having a crooked beak. • CURVIROSTRAL adj. having a curved bill.
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| DENTIROSTRAL | • dentirostral adj. (Zoology) Having a toothed bill. • DENTIROSTRAL adj. with notched beak.
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| FISSIROSTRAL | • fissirostral adj. Having the bill cleft beyond the horny part, as in the case of swallows and goatsuckers. • FISSIROSTRAL adj. having a divided beak.
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| LONGIROSTRAL | • longirostral adj. (Zoology) Having a long bill. • longirostral adj. (Zoology) Of or pertaining to the Longirostres.
 • LONGIROSTRAL adj. having an elongated beak.
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| RECTIROSTRAL | • RECTIROSTRAL adj. having straight beak. | 
| TENUIROSTRAL | • tenuirostral adj. (Zoology) Having a thin bill. • TENUIROSTRAL adj. of a bird, slender-billed.
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| LAMELLIROSTRAL | • lamellirostral adj. (Zoology) Having a lamellate bill. • LAMELLIROSTRAL adj. having transverse lamellae within the edge of the bill, also LAMELLIROSTRATE.
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| RECURVIROSTRAL | • RECURVIROSTRAL adj. with up-bent bill. | 
| SERRATIROSTRAL | • serratirostral adj. (Zoology) Having a toothed bill, like that of a toucan. • SERRATIROSTRAL adj. saw-billed.
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