biconcave

Intermediate (B1)

IPA: //ˌbaɪ.kɒnˈkeɪv//

KK: /ˈbaɪ.kɒn.keɪv/

adjective

Definition

Having a surface that curves inward on both sides.

Example

The biconcave lens is used in various optical devices to focus light.

Conversation

Have you seen that new biconcave lens they released?

Yeah, I heard it's great for astronomy!

I want to try one for my telescope; they say it really enhances the view.

Definitely! A biconcave design could make a huge difference in clarity.

Synonyms & Antonyms

Synonyms

concave

hollow

depressed

Antonyms

convex

bulging

protruding

Root Explanation

Biconcave → It is formed from "bi-" (meaning two) and "concavus" (from Latin, meaning hollow or curved inward). The word "biconcave" describes a shape that is hollowed out on both sides, resembling a lens.

Memory Tip

Think of a shape that is 'hollowed out' ('concavus') on 'two' sides ('bi-') — that's what biconcave means.

Visually Confused Words

miconcave