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

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

And how common are the particularly good expander graphs for which this tension is highest? —Leila Sloman, Quanta Magazine, 18 Apr. 2025

The sturdy spinner has an expander, compression straps, a divider with a pocket, and an adjustable multi-height handle. —Hillary Maglin, Travel + Leisure, 30 Nov. 2024

These methods vary widely, including mouth taping to encourage nose breathing, using nostril expanders, taking supplements, and investing in sleep-tracking devices like an Oura ring. —Maggie O'Neill, Verywell Health, 10 Oct. 2024

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