1) Plane figure 2) Two-dimensional figure 
• (n.) A sectorial, or carnassial, tooth. • (a.) Adapted for cutting.
(sek-tor´e-әl) cutting.
Sec·to'ri·al adjective (Anat.) Adapted for cutting. -- noun A sectorial, or carnassial, tooth. 
Type: Term Pronunciation: sek-tō′rē-ăl Definitions: 1. Relating to a sector. 2. Cutting or adapted for cutting; denoting the carnassial or shearing molar and premolar teeth of carnivores.
[adj] - relating to or resembling a sector
adjective relating to or resembling a sector; `a sectorial box`