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planarian

(Encyclopedia)planarian, common name for several genera of the free-living (turbellarian) flatworms belonging to the order Tricladida, a name that derives from their characteristic three-branched digestive cavities...

catfish

(Encyclopedia)catfish, common name applied to members of the fish families constituting the order Siluriformes, found in fresh and coastal waters. Catfish are named for the barbels (“whiskers”) around their mou...

mealybug

(Encyclopedia)mealybug, common name for certain unarmored scale insects that exude a granular white secretion, giving them a mealy appearance. Many are common greenhouse and crop pests. Adult females are wingless, ...

passionflower

(Encyclopedia)passionflower, any plant of the genus Passiflora, mostly tropical American vines having pulpy fruits. Some species are grown in greenhouses for their large, unusual flowers of various colors; those se...

baneberry

(Encyclopedia)baneberry, any plant of the small genus Actaea, north temperate perennials of the family Ranunculaceae (buttercup family) sometimes cultivated for the handsome (though poisonous) berrylike fruits. Nat...

worm lizard

(Encyclopedia)worm lizard, partially or entirely limbless burrowing lizard of the family Amphisbaenidae. All worm lizards lack hind limbs and most species lack forelimbs as well. Except for their size, they are ver...

stonecrop

(Encyclopedia)stonecrop, common name for members of the Crassulaceae (also called orpine, or hen-and-chickens, family), a family of succulent, fleshy herbs and shrubs mostly inhabiting arid regions in many parts of...

pheromones

(Encyclopedia)pheromones, any of a variety of substances, secreted by many animal species, that alter the behavior of individuals of the same species. Sex attractant pheromones, secreted by a male or female to attr...

characin

(Encyclopedia)characin –sĭd [key], common name for members of the Characidae, a large and diverse family comprising 700 species of freshwater fishes. The characins are related to the carp and the catfish. They a...

molly

(Encyclopedia)molly or mollie, New World fish of the genus Poecilia, which includes the guppy or rainbow fish, Poecilia reticulata. Mollies, which are related to the killifishes, are found from the E and central Un...