Search the Dictionary

A fossil resin occurring in large masses in New Zealand.

; -- opposed to mitosis. It is not the usual mode of division, and is believed by many to occur chiefly in highly specialized cells which are incapable of long-continued multiplication, in transitory structures, and in those in early stages of degeneration.

orema ammoniacum. It is brought chiefly from Persia in the form of yellowish tears, which occur singly, or are aggregated into masses. It has a peculiar smell, and a nauseous, sweet taste, followed by a bitter one. It is inflammable, partially soluble in water and in spirit of wine, and is used in medicine as an expect…

A common mineral embracing many varieties varying in color and in composition. It occurs in monoclinic crystals; also massive, generally with fibrous or columnar structure. The color varies from white to gray, green, brown, and black. It is a silicate of magnesium and calcium, with usually aluminium and iron. Some comm…

A white or flesh-red mineral, of the zeolite, occurring in isometric crystals. By friction, it acquires a weak electricity; hence its name.

A silicate of aluminium, occurring usually in thick rhombic prisms, nearly square, of a grayish or pale reddish tint. It was first discovered in Andalusia, Spain.

A native sulphate of lead. It occurs in white or yellowish transparent, prismatic crystals.

A mineral of the feldspar family, commonly occurring in small glassy crystals, also a constituent of some igneous rocks. It is a lime feldspar. See Feldspar.

Being or occurring before the creation of the world. Young.

To take up or introduce beforehand, or before the proper or normal time; to cause to occur earlier or prematurely; as, the advocate has anticipated a part of his argument.

An opposition or contrast of words or sentiments occurring in the same sentence; as, "The prodigal robs his heir; the miser robs himself." "He had covertly shot at Cromwell; he how openly aimed at the Queen."

Native phosphate of lime, occurring usually in six-sided prisms, color often pale green, transparent or translucent.

Connected with the apogee; as, apogean (neap) tides, which occur when the moon has passed her apogee.

A mineral relating to the zeolites, usually occurring in square prisms or octahedrons with pearly luster on the cleavage surface. It is a hydrous silicate of calcium and potassium.

Striking; attracting attention; impressive. This most solemn and arresting occurrence. J. H. Newman.

To happen or occur. [Archaic] Happy! to whom this glorious death arrives. Waller.

Abnormal thickening and hardening of the walls of the arteries, esp. of the intima, occurring mostly in old age. -- Ar*te`ri*o*scle*rot"ic (#), a.

A bacterial resting cell, -- formerly considered a spore, but now known to occur even in endosporous bacteria. -- Ar`thro*spor"ic (#), Ar*thros"po*rous (#), a.

A variety of amphibole or of pyroxene, occurring in long and delicate fibers, or in fibrous masses or seams, usually of a white, gray, or green-gray color. The name is also given to a similar variety of serpentine.

A parasitic nematoid worm, espec. the roundworm, Ascaris lumbricoides, often occurring in the human intestine and allied species found in domestic animals; also commonly applied to the pinworm (Oxyuris), often troublesome to children and aged persons.