- A curved, beaklike projection at the prow of a ship; esp., such a projection on a war galley, used for ramming enemy vessels; beak.
- The speakers' platform in the Forum, decorated with such beaks taken from captured ships.
- 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.
- A beaklike projection of a plant part, as the fruit of a geranium.
Origin of rostrum
- Latin rōstrum beak rēd- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition