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Dictionary · Word part

pseudo-

A word beginning that means false or fake: something that looks like another thing but is not.

SOO-doh prefix

What it means

The beginning of words for a look-alike. A pseudomembrane is a false membrane, as in diphtheria; a pseudocyst is a fluid pocket without a true cyst lining, as after pancreatitis; pseudohyponatremia is a lab result that falsely shows low sodium.

At a glance

Also writtenpseud/o

Related terms

diphtheria

A serious bacterial infection, caused by Corynebacterium diphtheriae, that mainly affects the nose and throat.

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