A horizon


: the uppermost dark-colored layer of a soil consisting largely of partly disintegrated organic debris

Word History

First Known Use

1896, in the meaning defined above

Time Traveler
The first known use of A horizon was in 1896

Dictionary Entries Near A horizon

Cite this Entry

“A horizon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/A%20horizon. Accessed 31 May. 2023.

Kids Definition

A horizon

A ho·​ri·​zon
: the outer dark-colored soil with a light texture consisting usually of soil rich in debris obtained from living things in various stages of disintegration
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