Search the Dictionary

A process of fecundation in which the pollen tube penetrates to the embryosac through the tissue of the chalaza, instead of entering through the micropyle. It was originally discovered by Treub in Casuarina, and has since been found to occur regularly in the families Betulaceæ and Juglandaceæ. Partial chalazogamy is fo…

A chinese reed instrument, with tubes, blown by the mouth.

That part of a building which contains the smoke flues; esp. an upright tube or flue of brick or stone, in most cases extending through or above the roof of the building. Often used instead of chimney shaft. Hard by a cottage chimney smokes. Milton.

A sedgelike plant (Cyperus esculentus) producing edible tubers, native about the Mediterranean, now cultivated in many regions; the earth almond.

A clay tobacco pipe, with a long tube. [Slang, Eng.] There was a small wooden table placed in front of the smoldering fire, with decanters, a jar of tobacco, and two long churchwardens. W. Black.

A framework, trough, or tube, upon or through which objects are made to slide from a higher to a lower level, or through which water passes to a wheel.

An instrument for measuring liquids. It consists of a piston moving in a tube in which is contained the liquid, the quantity expelled being indicated by the graduation upon the piston rod.

ce, or scoriaceous lava from a volcano. Cinder frame, a framework of wire in front of the tubes of a locomotive, to arrest the escape of cinders. -- Cinder notch (Metal.), the opening in a blast furnace, through which melted cinder flows out.

To obstruct so as to hinder motion in or through; to choke up; as, to clog a tube or a channel.

into the lower intestines by means of a syringe; an injection; an enema. Clyster pipe, a tube or pipe used for injections.

of Devonian ganoid fishes, having the broad plates about the head studded with berrylike tubercles.

stroyed by tapping. A common form of coherer as used in wireless telegraphy consists of a tube containing filings (usually a pinch of nickel and silver filings in equal parts) between terminal wires or plugs (called conductor plugs).

A tube having a convex lens at one end and at the other a small opening or slit which is at the principal focus of the lens, used for producing a beam of parallel rays; also, a lens so used.

their flowers arranged in dense heads of many small florets and their anthers united in a tube. The daisy, dandelion, and asters, are examples.

A flexible tube for connecting the ends of glass tubes in pneumatic experiments.

ion. Consumption of the bowels (Med.), inflammation and ulceration of the intestines from tubercular disease.

tly converted. B. Jonson. Converted guns, cast-iron guns lined with wrought-iron or steel tubes. Farrow. -- Converting furnace (Steel Manuf.), a furnace in which wrought iron is converted into steel by cementation.

Rising or swelling into a spherical or rounded form; regularly protuberant or bulging; -- said of a spherical surface or curved line when viewed from without, in opposition to concave. Drops of water naturally form themselves into figures with a convex surface. Whewell. Double convex, convex on both sides; convexo-conv…

Made convex; protuberant in a spherical form. Sir T. Browne.

A tube or quill upon which silk is wound.