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A rare metallic element. It occurs quite widely, but in small quantities, and always combined. It is isolated as a soft yellowish white metal, analogous to potassium in most of its properties. Symbol Rb. Atomic weight, 85.2.

A Russian, or the Russians. [Rare, except in poetry.]

A rare element of the light platinum group, found associated with platinum ores, and isolated as a hard, brittle steel-gray metal which is very infusible. Symbol Ru. Atomic weight 103.5. Specific gravity 12.26. See Platinum metals, under Platinum.

A rare metallic element of doubtful identity.

A rare mineral having a velvet-black color and submetallic luster. It is a niobate of uranium, iron, and the yttrium and cerium metals.

Without; deprived or destitute of. Rarely used as an English word. "Sans fail." Chaucer. Sans teeth, sans eyes, sans taste, sans everything. Shak.

nd historiographers; a reciter and singer of heroic poems, etc., among the Norsemen; more rarely, a bard of any of the ancient Teutonic tribes. [Written also skald.] A war song such as was of yore chanted on the field of battle by the scalds of the yet heathen Saxons. Sir W. Scott.

A rare metallic element of the boron group, whose existence was predicated under the provisional name ekaboron by means of the periodic law, and subsequently discovered by spectrum analysis in certain rare Scandinavian minerals (euxenite and gadolinite). It has not yet been isolated. Symbol Sc. Atomic weight 44…

ul or abundant; in small quantity in proportion to the demand; not easily to be procured; rare; uncommon. You tell him silver is scarcer now in England, and therefore risen one fifth in value. Locke. The scarcest of all is a Pescennius Niger on a medallion well preserved. Addison.

id generated by the revolution of the sector of a circle about one of its radii, or, more rarely, about any straight line drawn in the plane of the sector through its vertex.

not receiving; to make certain; to assure; to insure; -- frequently with against or from, rarely with of; as, to secure a creditor against loss; to secure a debt by a mortgage. It secures its possessor of eternal happiness. T. Dick.

Rarely known; unusual; strange. [Obs.] [She] wondered much at his so selcouth case. Spenser.

Rare; uncommon; unusual. [Obs.] Chaucer. Spenser.

Rarely; not often; not frequently. Wisdom and youth are seldom joined in one. Hooker.

Rareness. Hooker.

Rarely shown or exhibited. [Obs.] Shak.

Once in a while; on rare occasions. [Colloq. U. S.]

A lining of planks or boards (rarely of metal) for protecting an embankment.

A fall or rain or hail of short duration; sometimes, but rarely, a like fall of snow. In drought or else showers. Chaucer. Or wet the thirsty earth with falling showers. Milton.

alled also single-footed pace. See Single, v. i. Single-foot is an irregular pace, rather rare, distinguished by the posterior extremities moving in the order of a fast walk, and the anterior extremities in that of a slow trot. Stillman (The Horse in Motion.)