radial

Radial things stick out from a center point or have to do with the radius of a circle. On a map, you can see that a traffic circle or roundabout consists of radial streets extending out from the center.

A radius is a line from the center of a circle to its edge, or circumference. The adjective radial describes anything that acts as a radius or resembles one — often something radial is literally a line sticking straight out from a center point. Radial tires are designed so that each individual rubber cord making up the tire's surface lies in a radial direction from the middle of the tire. In Latin, radius means "shaft" or "spoke of a wheel."

Definitions of radial
  1. adjective
    relating to or near the radius
    “the radial aspect of the forearm”
  2. adjective
    relating to or moving along or having the direction of a radius
    radial velocity”
  3. adjective
    arranged like rays or radii; radiating from a common center
    radial symmetry”
    “many cities show a radial pattern of main highways”
    synonyms: radiate, stellate
    symmetric, symmetrical
    having similarity in size, shape, and relative position of corresponding parts
  4. adjective
    issuing in rays from a common center; relating to rays of light
    radial heat”
  5. noun
    pneumatic tire that has radial-ply casing
    synonyms: radial tire, radial-ply tire
    see moresee less
    type of:
    pneumatic tire, pneumatic tyre
    a tire made of reinforced rubber and filled with compressed air; used on motor vehicles and bicycles etc
Word Family
EDITOR’S CHOICE

Test prep from the experts

Boost your test score with programs developed by Vocabulary.com’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.

SAT/PSAT

$29.95
  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week

TOEFL

$29.95
  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week

ACT

$29.95
  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week