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.
Definition of stalk. 1 :  a slender upright object or supporting or connecting part; especially : peduncle. 2a : the main stem of an herbaceous plant often with its dependent partsb : a part of a plant (such as a petiole or stipe) that supports another.