| PE | Edinburgh Pharmacopoeia; pancreatic extract; paper electrophoresis; partial epilepsy; pelvic examina... |
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| global ecology | <study> The study of the relationship of organisms to each other and to their environment on a global scale. (09 Oct 1997) |
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| human ecology | The relations of persons to their total (biologic and social) environment. (05 Mar 2000) |
| ecology | <study> The scientific study of the relationship of organisms to each other and to their environment. (09 Oct 1997) |
| aquatic | <ecology, marine biology> Living in or on water for all or a substantial part of the life span (generally restricted to fresh water or inland waters). (09 Oct 1997) |
| aquatic plant | <botany> Plants that must grow in water whether rooted in the mud or floating without anchorage, plants that must complete part or all of their life cycle in or near the water. (09 Oct 1997) |
| aquatic root | <plant biology> Roots that develop on stems above the normal position occupied by roots, in response to prolonged inundation with water. (09 Oct 1997) |
| shaded riverine aquatic cover | Near-shore aquatic area occurring at the interface between a stream and adjacent woody habitat. (09 Oct 1997) |
| special aquatic site | Those sites identified in 40 CRF 230, Subpart E (i.e., sanctuaries and refuges, wetlands, mud flats, vegetated shallows, coral reefs, and riffle and pool complexes). They are geographic areas, large or small, possessing special ecological characteristics of productivity, habitat, wildlife protection, or other important and easily disrupted ecological values. These areas are generally recognised as significantly influencing or positively contributing to the general overall environmental health or vitality of the entire ecosystem of a region. Source: Environmental Protection Agency, 40 CFR |
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