from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Botany An outgrowth on the surface of an organ.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A small outgrowth on the surface of a plant organ.
- n. The generation of such an outgrowth.
from the GNU version of the Collaborative International Dictionary of English
- n. Any unusual outgrowth from the surface of a thing, as of a petal; also, the capacity or act of producing such an outgrowth.
from The Century Dictionary and Cyclopedia
- n. In botany, the production of outgrowths or appendages upon the surface of an organ.
- n. In ethnology, maternal relationship.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. line of descent traced through the maternal side of the family
- n. a natural projection or outgrowth from a plant body or organ
For our present purpose hypertrophy may be considered as it affects the axile or the foliar organs, and also according to the way in which the increased size is manifested, as by increased thickness or swelling -- intumescence, or by augmented length-elongation, by expansion or flattening, or, lastly, by the formation of excrescences or outgrowths, which may be classed under the head of luxuriance or enation.
In the following illustrations the course of development has not, in all cases, been observed, and hence the explanation here given must be taken with some reserve; for should it prove that the adventitious lobes, &c., are formed simultaneously with the ordinary petals, the case will be one of chorisis rather than of enation, as here understood.
Whether these supernumerary petals are formed by chorisis or by enation cannot, with certainty, be determined without examining the early stages of development.
In enation the new growth projects from a previously formed organ after it has attained to considerable size, or even after its ordinary proportions have been attained, and it sprouts out from the beginning in
True chorisis or fission, for instance, is usually a congenital affection, arising at a very early period of development, while enation takes place from structures which are all but complete as to their organisation, even though they may not have attained their full dimensions.
Such leaves as those of the hedgehog holly, _Ilex Aquifolium_, var. _feroæ_, and, to a less extent, bullate leaves, may also be mentioned here as illustrations of hypertrophy or enation.
This matter will be more fully treated of under the head of hypertrophy and enation.
The development of adventitious growths by chorisis or enation has been frequently alluded to in the foregoing pages, and many illustrations have been given of the power that leaves have of branching in more than one plane, owing to the projection of secondary growing-points from the primary organ.
Th enation and world ar ein this mess because of huge deficits by the previous president and one year isn't enough time to clean it up.
First record of spider mite Tetranychus ludeni Zacher transmitting dolichos enation mosaic virus