| Biogeochemical cycle | (Environmental Engineering) The cycle of elements through the biotic and abiotic environment. |
| Compound | (Environmental Engineering) A substance composed of two or more elements. |
| Elementary reaction | (Environmental Engineering) A reaction in which the rate expression corresponds to the stoichiometric equation. |
| Aesthetic design - | (Software Engineering) a Web engineering action that focuses on the aesthetics (e.g., the artistic elements) of a WebApp (often encompasses graphic design) |
| Classes - a basic construct in object - | (Software Engineering) oriented methods that categorizes elements of the problem |
| Navigation analysis - | (Software Engineering) a Web engineering action that establishes how a user will navigate between various elements (e.g., content, functions) of a WebApp |
| Objects - | (Software Engineering) a named element of the problem domain containing data and processing |
| OCL (Object Constraint Language) - | (Software Engineering) a supplement to UML, this formal language allows a software engineer to construct unambiguous statements about the characteristics of various design model elements |
| System engineering - | (Software Engineering) focuses on the analysis and design of all elements of a complete product, service, or technology for the transformation of information or control |
| Calcareous | (Concrete Engineering) Containing calcium carbonate or, less generally, containing the element calcium. |