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Due to an external cause; not arising within the organism.
Growing by addition to the outer surfaces.
Pertaining to those factors in the metabolism of nitrogenous substances obtained from food.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



in botany, a term referring to the development of lateral organs in the peripheral cell layers of the main axis of a particular plant organ. Examples of exogenous organs are the leaves that develop in the form of external nodes on the growing point of shoots, root hairs (which are lateral growths of root integuments), and some epidermal growths (trichotomes) of a plant’s aboveground organs.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
However, the predictive models based upon the exogenous boosting hypothesis are built upon scanty data.
Exogenous ochronosis following hydroguinone for melasma.
Histologically, ELP is characterized by the presence of intra-alveolar lipid and lipid-laden macrophages and a chronic foreign body-type reaction with inhaled exogenous lipid droplets [1, 2].
Furthermore, except for the modulatory mechanisms on the exogenous and endogenous stem cells, the microenvironmental factors that control the stem cell niches were also discussed in this special issue.
Current study elucidates the effects exogenous C2 ceramide and a ceramidase inhibitor- ceranib-2 on cell death in carcinomic human alveolar basal epithelial cells, A549.
It was well documented that exogenous application of proline had beneficial effects on plants exposed to salinity conditions (Ahmed et al., 2010; Abdelhamid et al., 2013; Wutipraditkul et al., 2015).
found that 1.3% of 4400 patients in their male infertility database were on exogenous testosterone and the majority of these patients had their therapy prescribed to them by endocrinologists and family practitioners [8].
Exposure to excessive amounts of exogenous iodine is a recognized cause of thyroid dysfunction.
Furthermore, experimental studies on different plants have shown that exogenous application of AsA may reduce salt-induced adverse effects and results in a significant increment of growth and yield [10, 11, 13].
We propose that statistical regression is not the most appropriate technique for analyzing the complex relationship between exogenous and endogenous variables.
Early research cited the maximum rate of exogenous carbohydrate oxidation to be ~1 g/min.
A study has demonstrated that colonization of conditional exogenous pathogens within the gut is an important pathologic basis of hospital-acquired infections in critically ill ICU patients.[sup][3] The gut is inhabited by the largest variety of bacteria.