from the GNU version of the Collaborative International Dictionary of English
- adj. pertaining to acrogens, flowerless plants (ferns or mosses) in which growth occurs only at the tip of the main stem.
from The Century Dictionary and Cyclopedia
- Relating or pertaining to the acrogens.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. pertaining to flowerless plants (ferns or mosses) in which growth occurs only at the tip of the main stem
Sorry, no etymologies found.
The Old Red flora seems to have been prevailingly an acrogenic flora; and yet with almost its first beginnings, -- contemporary with at least the earlier fossils of the system in Scotland, we find a true polycotyledonous tree, not lower in the scale than the araucarites of the Coal Measures, -- which in structure it greatly resembles, -- or than the pines or cedars of our own times (see Fig. 3).
The terrestrial remains of the Upper Silurians of England, the oldest yet known, consist chiefly of spore-like bodies, which belonged, says Dr. Hooker, to Lycopodiaceæ, -- an order of the second or acrogenic class.