a straight line from the centre to the circumference of a circle or sphere
半径。
a radial line from the focus to any point of a curve
辐射距离。
the length of the radius of a circle or sphere
半径距离。
a specified distance from a centre in all directions
(指明的)半径范围
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there are plenty of local pubs within a two-mile radius. 在两英里范围内有许多本地酒馆。
【剖】 桡骨。比较
【动】 (脊椎动物前肢或鸟翅的)桡骨。
【动】 (棘皮动物或腔肠动物的)辐射对称轴。
【昆】 径脉。
give a rounded form to (a corner or edge)
使(角,边缘)成弧形。
" late 16th cent. (in sense 2): from Latin, literally ‘staff, spoke, ray’."