Possible signs and symptoms in anyone older than the age of 2 include: 1  Sudden high fever. 2  Stiff neck. 3  Severe headache that seems different than normal.  Headache with nausea or 1  vomiting. Confusion or difficulty concentrating. 2  Seizures. Sleepiness or difficulty waking.  Sensitivity to 1  light. No appetite or  thirst.
Lexis (linguistics) In generative linguistics, a lexis or lexicon is the complete set of all possible words in a language. In this sense, child, children, child's and children's are four different words in the English lexicon. In systemic-functional linguistics, a lexis or lexical item is the way one calls a particular thing or a type of phenomenon.
Lexicon can refer to a general dictionary of a language (as in a lexicon of the Hebrew language) and also to a narrower printed compilation of words within some sphere (as in a medical lexicon or a lexicon of the German in Finnegans Wake).