expander

noun

ex·​pand·​er ik-ˈspan-dər 

: one that expands

specifically : any of several colloidal substances (such as dextran) of high molecular weight used as a blood or plasma substitute for increasing the blood volume

Examples of expander in a Sentence

Recent Examples on the Web

Standout details include a separate shoe compartment, a wet pocket for damp bathing suits, an expander, and a USB charging port. —Sophie Dodd, Travel + Leisure, 7 Jan. 2026

This vaporizes, driving an expander that spins a generator to produce energy. —Chris Young, Interesting Engineering, 29 Dec. 2025

When the expander is zipped up, the luggage slides easily into almost all overhead compartments. —Izzy Baskette, PEOPLE, 21 Nov. 2025

This capability is particularly useful for patients with magnetic spinal rods or breast tissue expanders, as adjustments can be made throughout the recovery process, ensuring the best possible outcome. —Jennifer Esposito, Forbes.com, 16 June 2025

Word History

First Known Use

1862, in the meaning defined above

Rhymes for expander

• bystander
• commander
• highlander
• leander
• meander
• philander
• brander
• candor
• dander
• gander
• grander
• hander

Medical Definition

expander

noun

ex·​pand·​er ik-ˈspan-dər 

: any of several colloidal substances (as dextran) of high molecular weight used as a blood or plasma substitute for increasing the blood volume

called also extender