Lobe. A round, projecting part of an organ, as of the liver, lungs, or brain.
Lymph (Lat. lympha, pure water). The watery fluid conveyed by the lymphatic vessels.
Lymphatic Vessels. A system of absorbent vessels.
Malleus. Literally, the mallet; one of the small bones of the middle ear.
Marrow. The soft, fatty substance contained in the cavities of bones.
Mastication (Lat. mastico, to chew). The act of cutting and grinding the food to pieces by means of the teeth.
Meatus (Lat. meo, meatum, to pass). A passage or canal.
Medulla Oblongata. The “oblong marrow”; that portion of the brain which lies upon the basilar process of the occipital bone.
Meibomian. A term applied to the small glands between the conjunctiva and tarsal cartilages, discovered by Meibomius.
Membrana Tympani. Literally, the membrane of the drum; a delicate partition separating the outer from the middle ear; it is sometimes popularly called “the drum of the ear.”