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Surrounding a cell; as, the pericellular lymph spaces surrounding ganglion cells.

The leafy involucre surrounding the fruit stalk of mosses; perichætium; perichete.

Inflammation of the tissues surrounding the bladder.

Surrounding a ganglion; as, the periganglionic glands of the frog.

Surrounding the stomach; -- applied to the body cavity of Bryozoa and various other Invertebrata.

Surrounding a muscle or muscles.

Surrounding nerves or nerve fibers; of or pertaining to the perineurium.

Surrounding the teeth.

Surrounding, or pertaining to the region surrounding, the internal ear; as, the periotic capsule. -- n.

Surrounding, or situated about, the petals.

The region surrounding the anus, particularly of echinoderms.

The region surrounding a moving body, such as the wing of a bird or a gliding aëroplane, within which cyclic or vortical motion of the air occur.

The membrane surrounding the mouth of an invertebrate animal.

etc.; specifically, a complete system of columns, whether on all sides of a court, or surrounding a building, such as the cella of a temple. Used in the former sense, it gives name to the larger and inner court of a Roman dwelling, the peristyle. See Colonnade.

An organ in certain fungi and lichens, surrounding and enveloping the masses of fructification. Henslow.

Surrounding the tracheæ.

Surrounding the uterus.

Surrounding the vertebræ.

or domestic affairs. [Colloq.] -- Petticoat pipe (Locomotives), a short, flaring pipe surrounding the blast nozzle in the smoke box, to equalize the draft.

The dwarf wall surrounding the arena of an amphitheater, from the top of which the seats began.