Search the Dictionary

A genus of marine mollusks belonging to the Scaphopoda, having a tubular conical shell.

A large cephalopod, especially the very large species of Octopus and Architeuthis. See Octopus.

An order of cephalopods which includes those with two gills, an apparatus for emitting an inky fluid, and either eight or ten cephalic arms bearing suckers or hooks, as the octopi and squids. See Cephalopoda.

An order of worms parasitic in cephalopods. They are remarkable for the extreme simplicity of their structure. The embryo exists in two forms.

A subclass of gastropod mollusks in which the sexes are separate. It includes most of the large marine species, like the conchs, cones, and cowries.

A genus of Branchiopoda, having a disklike shell, attached by one valve, which is perforated by the peduncle.

One of the muscles which open the shell of brachiopods; a cardinal muscle. See Illust. of Brachiopoda.

bird of certain genera, as Urinator (formerly Colymbus), or the allied genus Colymbus, or Podiceps, remarkable for their agility in diving.

An order of gastropods, including the true limpets, and having the teeth on the odontophore or lingual ribbon.

A small genus of perennial herbaceous plants, with poisonous milky juice, bearing slender pods pods in pairs.

A division of chætopod annelids in which the branchiæ are along the back, on each side, or on the parapodia. [See Illusts. under Annelida and Chætopoda.]

A marine gastropod, of several species, which kills oysters and other bivalves by drilling holes through the shell. The most destructive kind is Urosalpinx cinerea. Bow drill, Breast drill. See under Bow, Breast. -- Cotter drill, or Traverse drill, a machine tool for drilling slots. -- Diamond drill. See under Diamon…

The May apple (Podophyllum peltatum).

A name given to various roots, tubers, or pods grown under or on the ground; as to:

s of pea (Amphicarpæa monoica). It is a climbing leguminous plant, with hairy underground pods.

In America, any small chilopodous myriapod, esp. of the genus Geophilus.

An order of Brachiopoda; the Lyopomata. See Brachiopoda.

A little, perennial, white, woolly plant (Leontopodium alpinum), growing at high elevations in the Alps.

A smooth, white, marine, gastropod shell of the genus Ovulum, resembling an egg in form.

The caudal spring used by Podura and related insects for leaping. See Collembola.