What's the difference between spumid and spumous?

Spumid

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Definition:

• (a.) Spumous; frothy.

Example Sentences:

Spumous

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Definition:

• (a.) Alt. of Spumy

Example Sentences:

• (1) At electron microscopy, the synovial membrane showed numerous large spumous cells and a peculiar appearance of the capillary vessels.
• (2) Light microscopy shows histiocytes, some of which contain an irregular nucleus with a spumous cytoplasm surrounded by many red blood cells.