Contributors in Science
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lacrimal gland
Science; General science
A tubuloalveolar or acinous skin gland, also known as the tear gland. The lacrimal glands develop from the skin epithelium which folds inward over the developing eye. Two types ...
radio-frequency amplifier
Science; General science
A tuned amplifier that amplifies the signals commonly used in radio communications. Amplifier designs in the radio-frequency (RF) range differ significantly from conventional ...
motorcycle
Science; General science
A two- or three-wheeled self-propelled motor vehicle. Power is usually supplied by an internal combustion engine of one or more cylinders with either air or liquid cooling, ...
hertzsprung-russell diagram
Science; General science
A two-dimensional diagram used extensively in astronomy, developed independently by Ejnar Hertzsprung in 1911 and Henry Norris Russell in 1913. In its original form, the ...
surface (geometry)
Science; General science
A two-dimensional geometric figure (a collection of points) in three-dimensional space. The simplest example is a plane—a flat surface. Some other common surfaces are spheres, ...
diode
Science; General science
A two-terminal electron device exhibiting a nonlinear current-voltage characteristic. Although diodes are usually classified with respect to the physical phenomena that give rise ...
semiconductor diode
Science; General science
A two-terminal electronic device that utilizes the properties of the semiconductor from which it is constructed. In a semiconductor diode without a pn junction, the bulk ...
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