To be considered as open source software by the software development industry, certain criteria must be met: The program must be freely distributed (It can be part of a package that is sold though, such as Red Hat has done with Linux in the example below).
The term broad-spectrum antibiotic refers to an antibiotic that acts against a wide range of disease-causing bacteria. A broad-spectrum antibiotic acts against both Gram-positive and Gram-negative bacteria, in contrast to a narrow-spectrum antibiotic, which is effective against specific families of bacteria. An example of a commonly used broad-spectrum antibiotic is ampicillin.
visible spectrum visÂ·iÂ·ble spectrum (vÄ­z'É-bÉl) n. The part of the electromagnetic spectrum visible to the human eye, extending from extreme red, 760.6 nanometers, to extreme violet, 393.4 nanometers.