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# Diagonal

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GRE TOEFL

## [编辑]解释

### [编辑] GRE 红宝书

• ［英］ 对角的 ( crossing a straight-side figure, eg a rectangle, from corner to corner)
• ［类］ diameter : circle / diagonal : rectangle ( 直径是圆形内最长直线 / 对角线是矩形内最长直线)

### [编辑] Webster Collegiate

• Etymology: Latin diagonalis, from Greek diagōnios from angle to angle, from dia- + gōnia angle; akin to Greek gony knee — more at knee
• Date: 1563
• 1.
• a. joining two vertices of a rectilinear figure that are nonadjacent or two vertices of a polyhedral figure that are not in the same face
• b. passing through two nonadjacent edges of a polyhedron <a diagonal plane>
• 2.
• a. inclined obliquely from a reference line (as the vertical) <wood with a diagonal grain>
• b. having diagonal markings or parts <a diagonal weave>

II. noun

• Date: 1571
• 1. a diagonal straight line or plane
• 2.
• a.
• (1) a diagonal direction
• (2) a diagonal row, arrangement, or pattern
• b. something oriented in diagonal position
• 3. slash 4