Tra từ concave polygon - Từ điển WordNet v3.1

Từ điển WordNet v3.1 - WordNet Dictionary

concave polygon

noun

a polygon such that there is a straight line that cuts it in four or more points
• Ant:
convex polygon
• Hypernyms:
polygon, polygonal shape
• Hyponyms:
reentrant polygon, reentering polygon