| 释义 |
ac·ro·gen
\ˈakrəjən\ noun
(-s)
Etymology: acr- + -gen; from the growing point's being at the tip of the stem
: 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 |