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.
A lexicon is the vocabulary of a person, language, or branch of knowledge (such as nautical or medical). In linguistics, a lexicon is a language's inventory of lexemes. The word lexicon derives from the Greek Î»ÎµÎ¾Î¹ÎºÏÎ½ (lexicon), neuter of Î»ÎµÎ¾Î¹ÎºÏÏ (lexikos) meaning of or for words..