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macropore

noun
mac·​ro·​pore | \ˈmakrəˌpō(ə)r\

Definition of macropore 

: a pore (as in coal) of comparatively large size especially : a pore in soil of such size that water drains from it by gravity and is not held by capillary action

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Other Words from macropore

macroporosity \¦ma(ˌ)krō+ \ noun
macroporous \¦makrə¦pōrəs, (ˈ)ma¦kräpərəs \ adjective

History and Etymology for macropore

macr- + pore

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