Category: M

The period of the life cycle between 45 and 65 years. Denoting (approximately) the ages from 35 to 55 years.  

A school for the intermediate grades that has largely replaced the junior high school. Most often, includes grades 5-8 or 6-8 elementary school; high school. An institution providing education to students between elementary school and high school, if the middle grades—for example, grades 5 to 8, 6 to 8, or 7 to 8—are taught in…

An antechamber to the inner ear that amplifies sound vibrations of the eardrum and transmits them to the cochlea. That part of the ear consisting of air-filled space in the temporal bone and extending from the tympanic membrane, which separates it from the external ear, to the inner ear. It contains three small bones (the…

A line dropped from the midpoint of either clavicle.  

Any microscopic animal.  

Cylindrical outgrowth from villi and surrounding epithelial cells. They constitute the brush border and function in absorption of nutrients. Microscopic, cilia-like protrusions present on the plasma membrane that emanate from the surface of the epithelial cells lining the intestinal wall.  

The process of producing microspores.  

Pollen mother cell.  

Enzymes located in the liver that break down substances into simpler compounds.  

Pertaining to objects that can be observed only with the aid of a microscope. Invisible to the naked eye. So small that it can only be seen through a microscope. Too small to be seen clearly without the use of a microscope. So incredibly tiny that it can only be seen when examined under a…