Any semi-automatic weapon; semi-shots, smg's, etc. (pronounced seh-MEE) 2 -(n.) An 18-wheeler truck (pronounced seh-MI) 1 - Semi's are only half as fun as automatics. 2 - Aparrently a semi loaded with cocaine and doritos rolled over on the freeway yesterday. #truck #18 wheeler #gat #gun #strap #automatic
The biological fields of botany, zoology, and medicine date back to early periods of civilization, while microbiology was introduced in the 17th century with the invention of the microscope. However, it was not until the 19th century that biology became a unified science.
Physical science, the systematic study of the inorganic world, as distinct from the study of the organic world, which is the province of biological science. Physical science is ordinarily thought of as consisting of four broad areas: astronomy, physics, chemistry, and the Earth sciences. Each of these is in turn divided into fields and subfields. This article discusses the historical developmentâwith due attention to the scope, principal concerns, and methodsâof the first three of these areas.