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.
LINK / CITE ADD TO WORD LIST. noun. The definition of a fissure is an opening in the Earth, or a disagreement or split on an issue. 1  A long and narrow crack in the earth that forms an opening is an example of a fissure.2  When two members of a group have a disagreement and split on an issue, this is an example of a fissure.he definition of a fissure is an opening in the Earth, or a disagreement or split on an issue.