perimeter

Từ điển American Heritage Dictionary 4th

pe·rim·e·ter (pə-rĭmʹĭ-tər)n.
1. Mathematics.
a. A closed curve bounding a plane area.
b. The length of such a boundary.
2. The outer limits of an area. See Synonyms at circumference.
3. A fortified strip or boundary usually protecting a military position. [Middle English perimetre, from Latin perimetros, from Greek : peri-, peri- + metron, measure; see meter².] per'i·metʹric (pĕr'ə-mĕtʹrĭk) or per'i·metʹri·cal (-rĭ-kəl) adj.per'i·metʹri·cal·ly adv.

• Từ đồng nghĩa / Synonyms:
  circumference, margin, border