MECHANICAL a.
d the pulley), the inclined plane with its modifications (the screw and the wedge), which convert a small force acting throught a great space into a great force acting through a small space, or vice versa, and are used separately or in combination. -- Mechanical solution (Math.), a solution of a problem by any art or…
METAZOA n.
Those animals in which the protoplasmic mass, constituting the egg, is converted into a multitude of cells, which are metamorphosed into the tissues of the body. A central cavity is commonly developed, and the cells around it are at first arranged in two layers, -- the ectoderm and endoderm. The group comprises nearly…