biconvex

Upper-Intermediate (B2)

IPA: //baɪˈkɒnvɛks//

KK: /baɪˈkɒnvɛks/

adjective

Definition

Having a curved shape that bulges outward on both sides.

Example

The lens in my glasses is biconvex, helping to correct my vision.

Conversation

Have you seen those new lenses?

Yeah, I heard they are biconvex for better vision.

Exactly! I think that design really helps with clarity.

For sure, I might consider getting a pair.

Synonyms & Antonyms

Synonyms

curved

convex

bulging

Antonyms

flat

concave

depressed

Root Explanation

Biconvex → It is formed from "bi-" (meaning two) and "convexus" (from Latin, meaning arched or curved). The word "biconvex" describes a shape that is curved outward on both sides, resembling two convex surfaces.

Memory Tip

Think of a shape that is 'curved outward' on 'both sides' — 'bi-' means two, and 'convex' refers to the outward curve.

Visually Confused Words