Search the Dictionary

A subdivision of the British Upper Silurian lying below the Old Red Sandstone; -- so named from the Ludlow, in Western England. See the Chart of Geology.

The portions of hard wheat kernels not ground into flour by the millstones: a kind of semolina prepared in Russia and used for puddings, soups, etc. -- called also manna groats.

A subdivision of the Chemung period in American geology. See Chart of Geology.

A subdivision of the Primordial or Cambrian period in American geology; -- so named from the sandstone of Potsdam, New York. See Chart of Geology.

The middle of the three groups into which the rocks of the Canadian period have been divided in the American Lower Silurian system. See the Chart of Geology.

A subdivision of a group, as of animals. Darwin.

A company or troop, especially the company pf performers in a play or an opera.

Any one of numerous species of bright-colored American birds belonging to Icterus and allied genera, especially Icterus icterus, a native of the West Indies and South America. Many of the species are called orioles in America. [Written also troopial.]

The middle subdivision of the Upper Silurian in Great Britain; -- so named from the typical locality in Shropshire.

A fish of the group Abdominales.

A group including the greater part of fresh-water fishes, and many marine ones, having the ventral fins under the abdomen behind the pectorals.

A group of cirripeds having abdominal appendages.

A group of annelids, so called because the species composing it have no special organs of respiration.

A group of Coelenterata, including the Medusæ or jellyfishes, and hydroids; -- so called from the stinging power they possess. Sometimes called sea nettles.

A group of intestinal worms, having the proboscis armed with recurved spines.

A group of teleostean fishes having spiny fins. See Acanthopterygii.

One of a group of arachnids, including the mites and ticks.

The group of Arachnida which includes the mites and ticks. Many species are parasitic, and cause diseases like the itch and mange.

like the clams and oysters; -- so called because they have no evident head. Formerly the group included the Tunicata, Brachiopoda, and sometimes the Bryozoa. See Mollusca.

A group of suctorial Infusoria, which in the adult stage are stationary. See Suctoria.