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A slender, nearly leafless, American herb (Polygonum articulatum), with jointed spikes of small flowers.

a common weed with jointed stems (Polygonum aviculare); knotweed.

The European Solomon's seal (Polygonatum verticillatum).

An annual weed (Polygonum Persicaria), having a lanceolate leaf with a dark spot in the middle.

The water pepper (Polygonum Hydropiper), an aquatic plant of Europe and North America.

A figure or polygon having nine sides and nine angles.

A combining form or prefix from Gr. poly`s, many; as, polygon, a figure of many angles; polyatomic, having many atoms; polychord, polyconic.

A vase with a separate cover, the body usually rounded or polygonal in plan with nearly vertical sides, a neck of smaller size, and a rounded shoulder.

gn. -- Prince's feather (Bot.), a name given to two annual herbs (Amarantus caudatus and Polygonum orientale), with apetalous reddish flowers arranged in long recurved panicled spikes. -- Prince's metal, Prince Rupert's metal. See under Metal. Prince's pine. (Bot.) See Pipsissewa.

An American butterfly (Polygonia, or Vanessa, Progne). It is orange and black above, grayish beneath, with an L-shaped silver mark on the hind wings. Called also gray comma.

A solid body standing on a triangular, square, or polygonal base, and terminating in a point at the top; especially, a structure or edifice of this shape.

which have the petals cut into narrow lobes. -- Ragged sailor (Bot.), prince's feather (Polygonum orientale). -- Ragged school, a free school for poor children, where they are taught and in part fed; -- a name given at first because they came in their common clothing. [Eng.] -- Rag"ged*ly, adv. -- Rag"ged*ness, n.…

To enter anew or again. Reëntering angle, an angle of a polygon pointing inward, as a, in the cut. -- Reëntering polygon, a polygon having one or more reëntering angles.

Same as Isometric. Regular polygon (Geom.), a plane polygon which is both equilateral and equiangular. -- Regular polyhedron (Geom.), a polyhedron whose faces are equal regular polygons. There are five regular polyhedrons, -- the tetrahedron, the hexahedron, or cube, the octahedron, the dodecahedron, and the icosahedr…

A bird having small polygonal scales covering the tarsi.

The name of several large perennial herbs of the genus Rheum and order Polygonaceæ.

A West Indian plant (Alternanthera polygonoides) somewhat resembling burstwort.

in a leaping position; as, a lion salient. Salient angle. See Salient, a., 4. -- Salient polygon (Geom.), a polygon all of whose angles are salient. -- Salient polyhedron (Geom.), a polyhedron all of whose solid angles are salient.

h cradle. See Cratch cradle, under Cratch. -- Scratch grass (Bot.), a climbing knotweed (Polygonum sagittatum) with a square stem beset with fine recurved prickles along the angles. -- Scratch wig. Same as Scratch, 4, above. Thackeray.

losing with a sheath; as, the sheathing leaves of grasses; the sheathing stipules of many polygonaceous plants.