| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
salmonella sal·mo·nel·la (sāl'mə-něl'ə)
n. pl. sal·mo·nel·lae (-něl'ē) or sal·mo·nel·las or salmonella
Any of various gram-negative, rod-shaped bacteria of the genus Salmonella, many of which are pathogenic, causing food poisoning, typhoid, and paratyphoid fever in humans and other infectious diseases in domestic animals.
Salmonella n.
A genus of aerobic to facultatively anaerobic gram-negative bacteria that are pathogenic in humans and animals.
| salmonella (sāl'mə-něl'ə) Pronunciation Key
Plural salmonellae (sāl'mə-něl'ē) or salmonellas Any of various gram-negative, rod-shaped bacteria of the genus Salmonella that cause food poisoning and typhoid fever in humans and other mammals. |
A category of bacteria that occurs in many pathogenic forms. One kind causes typhoid fever; there is evidence that other kinds cause various forms of food poisoning.