exogen
Americannoun
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exogens
plural
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Physiology. the fourth and final stage in the hair growth cycle, in which an individual hair is released from the follicle and shed before a new one grows. Compare anagen, catagen, and telogen.
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Botany. a plant that grows by adding to the stem's outside layer, which consists of bark separated by a layer of wood from the inner layer of pith. Exogens are the same as dicotyledons. Contrasts with endogen.
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The former sees a tree in all its glory, where the latter sees an exogen with a pair of cotyledons.
From The Unseen World and Other Essays by John Fiske
It is, according to Von Martius, the Cedrela Odorata, an exogen belonging to the same order as the mahogany tree.
From The Naturalist on the River Amazons by Henry Walter Bates
Professor Huxley is credited with the assertion that the primrose is "a corollifloral dicotyledonous exogen, with a monopetalous corolla and a central placenta."
From English as She is Wrote Showing Curious Ways in which the English Language may be made to Convey Ideas or obscure them. by Anonymous
Clumps of palms threw their fronds above the forest roof in some places, or a giant exogen raised a dome; but that was all.
From The Sea and the Jungle by H. M. (Henry Major) Tomlinson
Smilax belongs to a transition class, partaking somewhat of the nature of endogen and of exogen.
From Scientific American Supplement, No. 623, December 10, 1887 by Various
If perfect plants, I apprehend the periodical rings, the distinctive mark of the exogens, would, by natural laws, be wanting; but, I suppose, added in the plants proceeding from the parent stem.
From The Bible: what it is by Charles Bradlaugh
Cambium, kam′bi-um, n. a layer of vascular tissue formed between the wood and the bark of exogens, in which the annual growth is formed.
From Chambers's Twentieth Century Dictionary (part 1 of 4: A-D) by Various
Palms were intermediate, filling the spaces between them, but the palms stood under the exogens, growing in alcoves of the mass, rising no higher than the beginning of the branches and foliage of their lords.
From The Sea and the Jungle by H. M. (Henry Major) Tomlinson
There are plants normally of an intermediate character, while, to take exceptional instances, there are exogens with the leaves and flowers of endogens, and endogens whose outward organisation, at any rate, assimilates them to exogens.
From Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants by Maxwell T. Masters
They are to be found in all exogens.
From Wood and Forest by William Noyes
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