Rabbet (from rebated). In Joinery a groove in the edge of a board.

Rabyte, O. E. (for Arabyte). An Arab horse.

Racana, Chr. A blanket of hair-cloth prescribed for the couches of monks, &c., in summer.

“Pro anis rachinis propter æstus utantur.”

Rack, O. E. The last fleeting vestige of the highest clouds.

Racon, O. E. The pot-hook by which vessels are suspended over a fire. (See Galows.)

Radiant, Rayonée. Encircled with rays. (Fig. [395].)

Radius, R. A pointed rod employed by certain professors of astronomy and mathematics for tracing figures on the sand. Also the spoke of a wheel, a ray of light, and lastly, a stake used in constructing intrenchments (valla).

Radula, R. A scraper, an iron tool used for paring or scratching off.

Raffaelle-ware. A fine kind of Urbino majolica, the designs for which were probably furnished by pupils of the great master.