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A genus of Bryozoa which produce delicate corals, often incrusting like lichens, but sometimes branched.

Like, or pertaining to, the genus Eschara, or family Escharidæ.

A genus of papaveraceous plants, found in California and upon the west coast of North America, some species of which produce beautiful yellow, orange, rose-colored, or white flowers; the California poppy.

A genus of fresh-water fishes, including pike and pickerel.

Essential character (Biol.), the prominent characteristics which serve to distinguish one genus, species, etc., from another. -- Essential disease, Essential fever (Med.), one that is not dependent on another. -- Essential oils (Chem.), a class of volatile oils, extracted from plants, fruits, or flowers, having each…

Pertaining to, or like, the genus Etheostoma. -- n.

Original or fundamental signification. [R.] Given as the etymon or genuine sense of the word. Coleridge.

A myrtaceous genus of trees, mostly Australian. Many of them grow to an immense height, one or two species exceeding the height even of the California Sequoia.

A genus of South American amaryllidaceous plants with large and beautiful white blossoms.

A genus of mytraceous plants, mostly of tropical countries, and including several aromatic trees and shrubs, among which are the trees which produce allspice and cloves of commerce.

A genus of small beetles, one species of which (E. viti) is very injurious to the vines in the wine countries of Europe.

A genus of small European and American trees; the spindle tree. The bark is used as a cathartic.

A genus of perennial, composite herbs including hemp agrimony, boneset, throughwort, etc.

Spurge, or bastard spurge, a genus of plants of many species, mostly shrubby, herbaceous succulents, affording an acrid, milky juice. Some of them are armed with thorns. Most of them yield powerful emetic and cathartic products.

A genus of elegant, glassy sponges, consisting of interwoven siliceous fibers, and growing in the form of a cornucopia; -- called also Venus's flower-basket.

A genus of water lilies, growing in India and China. The only species (E. ferox) is very prickly on the peduncles and calyx. The rootstocks and seeds are used as food.

Like, or pertaining to, the genus Euryperus.

An extinct order of Merostomata, of which the genus Eurypterus is the type. They are found only in Paleozoic rocks. [Written also Eurypterida.]

A genus of extinct Merostomata, found in Silurian rocks. Some of the species are more than three feet long.

A genus of palms, some species of which are elegant trees.