ac·ro·gen | \ ˈa-krə-jən \
plural -s
Definition of acrogen
: a plant of the higher cryptogams predominant in the Carboniferous era including ferns, fern allies, mosses, and liverworts and distinguished by growth from a special cell or growing point — compare thallogen, thallophyte
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Time Traveler for acrogen
The first known use of acrogen was in 1834
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