1. 辐射状的；向各方向伸展的；放射状的
Radial refers to the pattern that you get when straight lines are drawn from the centre of a circle to a number of points round the edge.

2. 子午线轮胎
A radial or a radial tyre is a tyre which is strengthened inside by cords that point towards the centre of the wheel. Radials are less likely to slide sideways on wet or icy roads than other tyres.

1. pneumatic tire that has radial-ply casing

Synonym: radial tireradial-ply tire