foam cell

noun

Definition of foam cell

: a swollen vacuolated macrophage filled with lipid inclusions that often accummulates along arterial walls and is characteristic of some conditions of disturbed lipid metabolism

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Open-cell foam cells are filled with air, which gives the insulation a spongy texture. — Timothy Dahl, Popular Mechanics, "How to Choose the Attic Insulation Your Home Needs," 13 Jan. 2019

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The first known use of foam cell was in 1926

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foam cell

noun

Medical Definition of foam cell

: a swollen vacuolated macrophage filled with lipid inclusions that often accumulates along arterial walls and is characteristic of some conditions of disturbed lipid metabolism