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color blindness

(Encyclopedia)color blindness, visual defect resulting in the inability to distinguish colors. About 8% of men and 0.5% of women experience some difficulty in color perception. Color blindness is usually an inherit...

Alaskan malamute

(Encyclopedia)Alaskan malamute mălˈəmyo͞otˌ [key], breed of strong, compact working dog believed to be one of the oldest arctic sled dogs. It stands about 23 in. (58.2 cm) high at the shoulder and weighs from ...

codling moth

(Encyclopedia)codling moth kŏdˈlĭng [key], small moth, Carpocapsa pomonella, whose larva is the destructive apple worm. Of European origin, it is now found wherever apples are grown. The adult moth is gray with ...

chernozem

(Encyclopedia)chernozem chĕrˈnəzĕmˌ [key] or black earth, variety of soil rich in organic matter in the form of humus. It is generally a modified type of loess. True chernozem is black in color, but there are ...

chalcedony

(Encyclopedia)chalcedony kălsĕdˈənē [key] [from Chalcedon], form of quartz the crystals of which are so minute that its crystalline structure cannot be seen except with the aid of a microscope. Chalcedony has ...

ipecac

(Encyclopedia)ipecac ĭpˈĭkăk [key], drug obtained from the dried roots of a creeping shrub, Cephaelis (or Psychotria) ipecacuanha, native to Brazil but cultivated in other tropical climates. There are three var...

Inns of Court

(Encyclopedia)Inns of Court, collective name of the four legal societies in London that have the exclusive right of admission to the bar. These societies—Lincoln's Inn, Gray's Inn, the Inner Temple, and the Middl...

mildew

(Encyclopedia)mildew, name for certain fungi and protists, for the diseases they cause in various crops, and for the discoloration (and sometimes the weakening and disintegration) they cause in such materials as le...

partridge

(Encyclopedia)partridge, common name applied to various henlike birds of several families. The true partridges of the Old World are members of the pheasant family (Phasianidae); the common European or Hungarian spe...

nutcracker

(Encyclopedia)nutcracker, common name for a small crow of the genus Nucifraga in the family Corvidae (crow family). The Old World nutcracker (N. caryocatactes) is found throughout the colder regions of Europe, incl...