rostrum


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rostrum

1. a platform or dais in front of an orchestra on which the conductor stands
2. another word for ram (sense 4)
3. the prow or beak of an ancient Roman ship
4. Biology Zoology a beak or beaklike part

Rostrum

 

(1) In fish, the anterior part of the neurocranium, located in front of the olfactory capsules. The rostrum is especially prominent as an integral cartilaginous process in Acipen-seridae, for example, in the stellate sturgeon (Acipenser stellatus) and Scaphirhyncus, and in chondrichthians, for example, in the sawfish and saw shark. In the smooth hound and other fish the rostrum is represented by three separate outgrowths. In the sawfish and saw shark large cutaneous teeth (placoid scales) are located along the sides of the rostrum; in these animals, the rostrum resembles a saw and serves as a weapon of defense and attack. In the majority of Batoidei the anterior edges of the pectoral fins are attached to the rostrum. The rostrum is reduced in many contemporary bony fishes and in terrestrial vertebrates.

(2) In reptiles and birds, the anterior process of the basisphe-noid bone. The rostrum is formed by the concrescence of the integumentary sphenoid bone to the basisphenoid bone.

rostrum

[′rä·strəm]
(biology)
A beak or beaklike process.

rostrum

A platform, elevated area, pulpit, or the like for addressing an audience.
References in periodicals archive ?
Based on the previously constructed model in [10], computational experiments are carried out with uniform pressure loading on rostrum using general static analysis in Abaqus/Standard [11].
Hence, we examined the structural variation of rostrum in male and female adults under light and electron microscopy to understand its functional potential in infestation/ovipositional tactics.
Our observations of longitudinal fresh-cut and ultra-thin sections of the rostra showed that the calcite crystals in the rostrum solidum began growing from spherulithic sectors or spherulites, which successively originated along the apical line during the progressive growth of the belemnite rostra.
Ventrally the prosternal canal ends at the middle of the middle coxae, width of mesosternum at the separation between middle coxae wider than the dorsal apex of the rostrum, and 1.
rostrum were prorated from the total pod count using mean weevil counts of intact pods.
In addition to the selected works, 11 other works were recommended for broadcasting and concert presentation after the Rostrum by the participating and other interested radio stations.
Yesterday ladies and gentlemen, from this rostrum, the president of the United States, the gentleman to whom I refer as the Devil, came here, talking as if he owned the world.
He said: "From this rostrum, we call for the elimination of Sudan's debt in accordance with the same standards applied to less developed countries.
It is the first medal for the sixstrong British team and Quilter said: "I feel really proud to be at the top of the rostrum with the other medallists - all who are Beijing Paralympic medal winners.
This is the first time that the candidate for NHIF is an independent and proved professional," Lachezar Ivanov, head of the health commission in parliament, said from the rostrum.
THE 15th birthday bash for Scotland's most respected label featured eight acts but it was memorable for just one band, the latest addition to Chemikal Underground's rostrum, The Unwinding Hours.
It's June, 1955, and these well-dressed pedestrians in Church Street, Liverpool, benefit from the new elevated rostrum for policewomen on point-duty, here directing two Corpy buses and a Standard 10.