Definition

A fin located at the back end of a fish, airplane, or car, often used for stability or decoration.

Example

The airplane's tailfin helps it maintain balance during flight.

Conversation

Did you see that plane with the cool tailfin design at the airshow?

Yeah, it was really unique! I loved how it stood out.

I wish more planes had interesting tailfins like that one.

For sure! It adds a lot of character to the aircraft.

Synonyms & Antonyms

Root Explanation

Tailfin → The word is formed from "tail" (from Old English *tægel*, meaning the rear part of an animal) and "fin" (from Old English *finn*, meaning a membranous appendage used for swimming). The term "tailfin" refers to the fin located at the rear of a fish or other aquatic animal, aiding in movement and stability.

Memory Tip

Think of the 'rear part' ('tail') of an animal having a 'membranous appendage' ('fin') — that's why a tailfin is a fin at the back.

Visually Confused Words