As mentioned above, mastoiditis most often develops as a result of a middle ear infection. Bacteria from the middle ear can travel into the air cells of the mastoid bone. In addition, a type of skin cyst in the middle ear, called a cholesteatoma, may block drainage of the ear, leading to mastoiditis. Mastoiditis symptoms may include: Fever, irritability, and lethargy.
LINK / CITE ADD TO WORD LIST. noun. The definition of a streak is a flash of light or a long thin line that stand out in color or texture from its surroundings. An example of a streak is a strip of red in otherwise blonde hair.
Full Definition of FISSURE. 1. : a narrow opening or crack of considerable length and depth usually occurring from some breaking or parting.2. a: a natural cleft between body parts or in the substance of an organ b: a break or slit in tissue usually at the junction of skin and mucous membrane.. : a narrow opening or crack of considerable length and depth usually occurring from some breaking or parting. 2.