Groin, Arch. The angular curve formed at the intersection of a vaulted roof; the line made by the intersection of arched vaults crossing each other at any angle. (See Fig. [173].)
Grolier Scroll. A beautiful and elaborate style of decoration for bookbinding, introduced by Grolier, a celebrated patron of bookbinding, in the 15th century.
Groma and Gruma, R. A quadrant; an instrument used by land-surveyors. In the plural, grumæ denotes the intersection of two roads cutting each other at right angles.
Fig. 367. Grotesque from a stall in Rouen Cathedral.
Grotesques, Arch. (It. grottesco, the style in which grottoes were ornamented). Figures of a monstrous, comic, or obscene character, which were spread in profusion over the façades of churches by mediæval artists (ymaigiers); in stone and in wood; on choir-stalls and the wood-work and wainscoting of interiors. Figs. 367, 368 represent figures upon the stalls and columns in Rouen Cathedral.
Fig. 368. Grotesque decoration from the Cathedral at Rouen.
Grounds or Priming. In painting, the first coat of colour laid all over the canvas, upon which the picture is to be painted.
Grus, Lat. (a crane). A constellation of the southern hemisphere.