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s that appear on the sun's disk, consisting commonly of a black central portion with a surrounding border of lighter shade, and usually seen only by the telescope, but sometimes by the naked eye. They are very changeable in their figure and dimensions, and vary in size from mere apparent points to spaces of 50,000 mile…

A method of hunting some animals, as the buffalo, by surrounding a herd, and driving them over a precipice, into a ravine, etc. [U.S.] Baird.

h attention, as from a high place; to overlook; as, to stand on a hill, and survey the surrounding country. Round he surveys and well might, where he stood, So high above. Milton.

An operation to diminish the size of the opening between eyelids when enlarged by surrounding cicatrices.

A cellular layer derived from the nucleus of an ovule and surrounding the embryo sac. Cf. Quintine.

he region of the larynx. In man and most mammals it is a highly vascular organ, partly surrounding the base of the larynx and the upper part of the trachea. -- Thyroid dislocation (Surg.), dislocation of the thigh bone into the thyroid foramen. -- Thyroid foramen, the obturator foramen.

A circle of sportsmen, who, by surrounding an extensive space and gradually closing in, bring a number of deer and game within a narrow compass. [Scot.] We'll quell the savage mountaineer, As their tinchel cows the game! Sir W. Scott.

A platform surrounding the head of the lower mast and projecting on all sudes. It serves to spead the topmast rigging, thus strengheningthe mast, and also furnishes a convenient standing place for the men aloft. Totten.

f all the vital functions so that the patient lies still and apparently unconscious of surrounding objects, while the pulsation of the heart and the breathing, although still present, are almost or altogether imperceptible. He fell down in a trance. Chaucer.

The metal loop which travels around the ring surrounding the bobbin, in a ring spinner.

ysted tumor, a tumor which is inclosed in a membrane called a cyst, connected with the surrounding parts by the neighboring cellular substance. -- Fatty tumor. See under Fatty. -- Innocent tumor, or Benign tumor, one which does not of itself threaten life, and does not usually tend to recur after extirpation. -- Mal…

A thin membrane surrounding the sporocarps of quillworts Isoetes).

, or aureole, of oval shape, or composed of two arcs of circles usually represented as surrounding a divine personage. More rarely, an oval composed of two arcs not representing a glory; a solid oval, etc.

A ring surrounding a bugle or hunting horn.

aining to the yolk of eggs; as, the vitelline membrane, a smooth, transparent membrane surrounding the vitellus.

by congelation of lava in the conduit of a volcano and later exposed by the removal of surrounding rocks.

The region immediately surrounding a disk moving flatwise through air; -- so called because the air has a cyclic motion as in vortex ring.

an axis disposed in circular form, attains a more or less distinct separation from the surrounding medium and has many of the properties of a solid.

the power of maintaining a nearly uniform temperature whatever the temperature of the surrounding air. See Homoiothermal.

A device for regulating the temperature of anything subjected to heat, by surrounding the vessel containing it with another vessel containing water which can be kept at a desired temperature; also, a vessel designed for this purpose.