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 (rŏs′trəm, rô′strəm)
n. pl. ros·trums or ros·tra (rŏs′trə, rô′strə)
1. A dais, pulpit, or other elevated platform for public speaking.
a. The curved, beaklike prow of an ancient Roman ship, especially a war galley.
b. The speaker's platform in an ancient Roman forum, which was decorated with the prows of captured enemy ships.
3. Biology A beaklike projection, especially:
a. An anterior projection of an insect's or an arachnid's mouthparts, of the upper jaw of a cetacean, or of the cephalothorax of a crustacean.
b. A beaklike projection of a plant part, as the fruit of a geranium.

[Latin rōstrum, beak; see rēd- in Indo-European roots.]
References in periodicals archive ?
However, few detailed analyses of belemnite rostra microstructures are available (Muller-Stoll, 1936; Jeletzky, 1966; Barskov, 1970; Spaeth, 1971; Bandel et al.
This work is based on the detailed study of fresh-cut and thin and ultra-thin sections of well-preserved Jurassic belemnite rostra under different petrographic techniques and aims to enlighten some of these controversies by demonstrating the spherulithic nature of belemnite rostra microstructures and that the prismatic calcite crystals in the rostra are composite and were formed through an earlier and biologically controlled phase of calcite and a subsequent phase of calcite that was probably non-biologically controlled, which strongly suggests that the belemnite rostra were porous in origin.
US-based private equity firm Superior Capital Partners LLC has completed an add-on acquisition for its Rostra Precision Controls platform, the company said.
1 July 2015 - US-based private equity firm Superior Capital Partners LLC has completed an add-on acquisition for its Rostra Precision Controls platform, the company said.
Vehicle Safety Manufacturing a division of Rostra, has acquired the turn signal switch product line from Grote Industries, Inc.
But Rostra, the University''s oldest drama society, are to launch their "Bring Theatre Back To Bangor Initiative Society chairman Daniel Cummings said the scheme aims to re-build interest in theatre in North Wales.
The new RearSight 250-8040 backup camera system from Rostra Precision Controls Inc.
Large fleet trucks and vans can be difficult to maneuver when they're in reverse, making our heavy-duty RearSight camera a useful tool for helping fleet drivers maintain control of their vehicles and avoid backing accidents," said Sibyl Ringsdorf, manager of marketing and national accounts for Rostra.
A serial investor has boosted the health of young company Rostra UK Ltd, which specialises in treating varicose veins.
A new, higher hipped roof made of dark reclaimed timber adds space and conceals service ductwork, while a simple rostra seating system offers directors and designers a great range of staging options.
A large fossil skull and several rostra of Makaira nigricans Lacepede, 1802 (Perciformes: Istiophoridae), as well as some less diagnostic istiophorid remains, have been recovered from the middle facies of the Trinidad Formation near Rancho Algodones, San Jose del Cabo Basin, Baja California Sur, Mexico.
Ansoft users representing General Motors (Delphi Electronics and Packard Electric), Automatic Switch, Hi-Stat Manufacturing, Rostra Precision Controls, Bicron Electronics, and Virginia Power Electronics Center participated in beta-site training and testing.