Columbia Encyclopedia

Search results

500 results found

cyanobacteria

(Encyclopedia)cyanobacteria sīˌənōbăktĭrˈēə, sī-ănˌō– [key] or blue-green algae, photosynthetic bacteria that contain chlorophyll. For many years they were classified in the plant kingdom along with ...

Chesterton, G. K.

(Encyclopedia)Chesterton, G. K. (Gilbert Keith Chesterton), 1874–1936, English author. Conservative, even reactionary, in his thinking, Chesterton was a convert (1922) to Roman Catholicism and its champion. He ha...

chicle

(Encyclopedia)chicle chĭkˈəl [key], name for the gum obtained from the latex of the sapodilla tree (Manilkara zapota), a tropical American evergreen. The sapodilla (known also by many other common names) is wide...

pratincole

(Encyclopedia)pratincole prătˈənkōlˌ [key], common name for a large-winged shore bird including seven species in the subfamily Glareolinae of the family Glareolidae. Swift and graceful flyers, their sharply po...

pipit

(Encyclopedia)pipit, common name for a group of chiefly Eurasian and African birds that together with the wagtails constitute a subfamily of songbirds related to the Old World warblers and thrushes. Pipits are trim...

treehopper

(Encyclopedia)treehopper, any member of three families of winged insects, remarkable for the curious shapes of most species. The shapes are due to the enlargement of the dorsal (upper) covering of the first thoraci...

avocet

(Encyclopedia)avocet ăvˈəsĕt [key], common name for a long-legged wading bird about 15 to 18 in. (37.5–45 cm) long, related to the snipe and belonging to the same family as the stilt. The American avocet or b...

opal

(Encyclopedia)opal ōˈpəl [key], a mineral consisting of poorly crystalline to amorphous silica, SiO2·nH2O; the water content is quite variable but usually ranges from 3% to 10%. Common opal is usually colorless...

basking shark

(Encyclopedia)basking shark, large, plankton-feeding shark, Cetorhinus maximus, inhabiting many oceans of the world, especially in temperate regions. Found singly or in schools of up to 100, it spends much of its t...

tanuki

(Encyclopedia)tanuki or raccoon dog, omnivorous mammal, Nyctereutes Procyonoides, of the dog family, native to the forests of E Asia. The tanuki is similar in appearance to a dog but has black, masklike facial mark...