longipennes

from The Century Dictionary.

• A major group of birds, the long-winged natatorial birds, such as gulls, terns, and petrels; the Gaviæ and Tubinares together considered as an order.
• In Sundevall's system, a synonym of Chelidonomorphæ.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Zoöl.) A group of longwinged sea birds, including the gulls, petrels, etc.