• Webster's Revised Unabridged Dictionary
    • a Rostral Of or pertaining to the beak or snout of an animal, or the beak of a ship; resembling a rostrum, esp., the rostra at Rome, or their decorations. "Monuments] adorned with rostral crowns and naval ornaments."
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Century Dictionary and Cyclopedia
    • rostral Of, pertaining to, or resembling a rostrum.
    • rostral In zoology: Of or pertaining to a rostrum in any sense; rostellar; rostriform.
    • rostral Having a rostrum or beak of this or that kind; rostrate: usually in composition with a qualifying epithet: as, lamellirostral, longirostral, fissirostral, conirostral, cultrirostral, curvirostral, rectirostral, dentirostral, recurvirostral, pressirostral, tenuirostral, serratirostral, etc. See the compounds.
    • n rostral A scale covering the end of the nose in reptiles; the rostral shield.
    • ***
Chambers's Twentieth Century Dictionary
    • adjs Rostral like a rostrum or beak
    • ***


Webster's Revised Unabridged Dictionary
L. rostralis, fr. rostrum, a beak; cf. F. rostral,
Chambers's Twentieth Century Dictionary
L. rostrum, the beak—rodĕre, rosum, to gnaw.


In literature:

Rostral shields triangular, erect.
"Discoveries in Australia, Volume 1." by J Lort Stokes
Other ornaments are twenty rostral columns, bearing twin burners.
"The Harris-Ingram Experiment" by Charles E. Bolton
Rostral: pertaining or attached to a rostrum; specifically of Hemiptera.
"Explanation of Terms Used in Entomology" by John. B. Smith
The rostral column was erected in honor of him.
"Hannibal" by Jacob Abbott
Scuta nearly oval, with their umbones at the rostral angle.
"A Monograph on the Sub-class Cirripedia (Volume 1 of 2)" by Charles Darwin
The other wore a rostral crown upon her head, and kept her eyes fixed upon a compass.
"The Tatler, Volume 3" by Various
Almost always the shell has a rostral sinus.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6" by Various
The vertical rostral keel is prominent in all freshly preserved specimens; in some older specimens it is indistinct.
"A Review of the Middle American Tree Frogs of the Genus Ptychohyla" by William E. Duellman
In front, a small "rostral plate" is joined to the carapace by a movable hinge, and partly covers the stalked eyes.
"The Life of Crustacea" by William Thomas Calman
Simpson's material included a rostral fragment with an incisor, premolar, and first molar.
"Evolution and Classification of the Pocket Gophers of the Subfamily Geomyinae" by Robert J. Russell

In science:

Briefly, the animals were sacrificed under deep anesthesia and brains were removed, frozen and coronally sectioned into six 2-mm-thick slices (from rostral to caudal, first to sixth) using a rat brain matrix (World Precision Instruments, Sarasota, FL, USA).
Post-ischaemic treatment with the cyclooxygenase-2 inhibitor nimesulide reduces blood-brain barrier disruption and leukocyte infiltration following transient focal cerebral ischaemia in rats