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A plant (Polianthes tuberosa) with a tuberous root and a liliaceous flower. It is much cultivated for its beautiful and fragrant white blossoms.

The state of being tuberous.

Consisting of, or bearing, tubers; resembling a tuber. -- Tu"ber*ous*ness, n.

Any annelid which constructs a tube; one of the Tubicolæ.

A long wrought iron tube, on the end of which the workman gathers a quantity of "metal" (melted glass), and through which he blows to expand or shape it; -- called also blowing tube, and blowpipe.

A corm.

ssing together; familiar; in companionship. Humble folk ben Christes friends: they ben contubernial with the Lord, thy King. Chaucer.

A vacuum tube in which the exhaustion is carried to a very high degree, with the production of a distinct class of effects; -- so called from W. Crookes who introduced it.

A swelling or rising; protuberance. [R.] Moxon.

Extuberance. [R.]

Swollen out; protuberant. [R.] "Extuberant lips." Gayton.

To swell out. [Obs.] Cockeram.

Protuberance. [Obs.] Farindon.

A glass tube provided with platinum electrodes, and containing some gas under very low tension, which becomes luminous when an electrical discharge is passed through it; -- so called from the name of a noted maker in germany. It is called also Plücker tube, from the German physicist who devised it.

A highly exhausted glass tube with metallic electrodes nearly in contact so as to exhibit the insulating effects of a vacuum. It was used by the German physicist W. Hittorf (b. 1824).

A tube for producing Lenard rays.

A bent tube used to determine the velocity of running water, by placing the curved end under water, and observing the height to which the fluid rises in the tube; a kind of current meter.

A vacuum tube, used in spectrum analysis, in which the part through which the discharge takes place is a capillary tube, thus producing intense incandescence of the contained gases.

That which is protuberant swelled or pushed beyond the surrounding or adjacent surface; a swelling or tumor on the body; a prominence; a bunch or knob; an elevation. Solar protuberances (Astron.), certain rose-colored masses on the limb of the sun which are seen to extend beyond the edge of the moon at the time of a so…

The quality or state of being protuberant; protuberance; prominence.