English definition of Exogen

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Definition of exogen

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Exogen (n.) A plant belonging to one of the greater part of the vegetable kingdom, and which the plants are characterized by having c wood bark, and pith, the wood forming a layer between the other two, and increasing, if at all, by the animal addition of a new layer to the outside next to the bark. The leaves are commonly netted-veined, and the number of cotyledons is two, or, very rarely, several in a whorl. Cf. Endogen..

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Sapwood :: Sapwood (n.) The alburnum, or part of the wood of any exogenous tree next to the bark, being that portion of the tree through which the sap flows most freely; -- distinguished from heartwood..

Exogenous :: Exogenous (a.) Pertaining to, or having the character of, an exogen; -- the opposite of endogenous..

Cycadaceous :: Cycadaceous (a.) Pertaining to, or resembling, an order of plants like the palms, but having exogenous wood. The sago palm is an example..

Pith :: Pith (n.) The soft spongy substance in the center of the stems of many plants and trees, especially those of the dicotyledonous or exogenous classes. It consists of cellular tissue..

Exogen :: Exogen (n.) A plant belonging to one of the greater part of the vegetable kingdom, and which the plants are characterized by having c wood bark, and pith, the wood forming a layer between the other two, and increasing, if at all, by the animal addition of a new layer to the outside next to the bark. The leaves are commonly netted-veined, and the number of cotyledons is two, or, very rarely, several in a whorl. Cf. Endogen..

Exo :: Exo () A prefix signifying out of, outside; as in exocarp, exogen, exoskeleton..

Extogenous :: Extogenous (a.) Exogenous.

Stere :: Sterculiaceous (a.) Of or pertaining to a natural order (Sterculiaceae) of polypetalous exogenous plants, mostly tropical. The cacao (Theobroma Cacao) is the most useful plant of the order..

Duramen :: Duramen (n.) The heartwood of an exogenous tree.

Zamia :: Zamia (n.) A genus of cycadaceous plants, having the appearance of low palms, but with exogenous wood. See Coontie, and Illust. of Strobile..

Exogenetic :: Exogenetic (a.) Arising or growing from without; exogenous.

Exogenous :: Exogenous (a.) Growing from previously ossified parts; -- opposed to autogenous.

Subclavian :: Subclass (n.) One of the natural groups, more important than an order, into which some classes are divided; as, the angiospermous subclass of exogens..

Exogenous :: Exogenous (a.) Growing by addition to the exterior.

Saxifraga :: Saxifraga (n.) A genus of exogenous polypetalous plants, embracing about one hundred and eighty species. See Saxifrage..

#NAME? :: -gen () A suffix meaning produced, generated; as, exogen..