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Definition of expander
: 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
From the M-W Editors
Recent Examples of expander from the Web
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This reconstructive procedure involves inserting tissue expanders under the chest skin and muscle at the time of the mastectomy, my surgeon explained.
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For them, LSD is less a kaleidoscopic mind expander than a humble mood enhancer, as subtle and quotidian as Prozac.
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So here goes with a far from complete itemization of the year’s great conversation starters — and continuers and expanders — in the New York theater.
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A small needle is used to fill the expander with sterile saline.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'expander'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of expander
1862
Medical Dictionary
expander
play
noun
ex·pand·er
\ik-ˈspan-dər\
Medical Definition of expander
: 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
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