In soil science, any of various fine-grained, rich, black, alluvial soils, especially of the central U.S., that when wet become impenetrable and soapy or waxy and very sticky. When dried, gumbo bakes and becomes extremely hard.
This entry comes from Encyclopædia Britannica Concise.
For the full entry on gumbo, visit Britannica.com.
Seen & Heard
What made you look up gumbo? Please tell us what you were reading, watching or discussing that led you here.