English Reference
adjective · noun

radial

adj. · n.
US /ˈɹeɪdiəɫ/ UK /ɹˈeɪdɪəl/ ra·di·al UK spelling radials

  1. 01 C1 Advanced Technical

    adj.arranged in straight lines that come out from a center point, like the spokes on a bicycle wheel.

    adj.arranged like rays that radiate from, or converge to, a common center point.

    Simple

    The city was built with a radial pattern of streets leading to the main square.

    In context

    The architect proposed a radial design for the new library, ensuring that all reading rooms were equidistant from the central circulation desk.

    Usage

    Often used to describe urban planning or geometric patterns.

  2. 02 C2 Proficiency Technical Science

    adj.relating to the radius bone in your arm or similar structures in plants and animals.

    adj.relating to the radius bone of the forearm or exhibiting symmetry around a central axis in biological organisms.

    Simple

    The doctor checked the patient's radial pulse at the wrist.

    In context

    Starfish exhibit radial symmetry, with their body parts arranged around a central disk rather than having a left and right side.

    Usage

    In medicine, it most frequently refers to the radial artery or nerve near the radius bone.

  3. 03 B2 Upper Intermediate Technical

    adj.a type of tire where the internal layers are arranged at a 90-degree angle to the direction of travel.

    adj.relating to a pneumatic tire in which the ply cords are laid substantially at 90 degrees to the centerline of the tread.

    Simple

    Most modern cars use radial tires because they last longer and provide a smoother ride.

    In context

    The transition from bias-ply to radial construction significantly improved vehicle fuel efficiency and cornering stability in the late twentieth century.

    cross plybias ply
  4. 04 B2 Upper Intermediate

    n.a tire that has a radial design.

    n.a pneumatic tire constructed with radial plies.

    Simple

    He needed to buy a new set of radials before the winter started.

    In context

    The mechanic recommended a high-performance radial for the sports car to ensure better grip on wet surfaces.

To build a web, orb-weaver spiders use strong silk that forms the frame and radial “spokes” of the web .

The Conversation· 4 Aug 2026

From Medieval Latin radiālis (“radial”), from Latin radius. By surface analysis, radius + -al.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Latin radius
Level C1 · Advanced
Frequency Frequent
Updated