Full Definition of AUTISM. : a variable developmental disorder that appears by age three and is characterized by impairment of the ability to form normal social relationships, by impairment of the ability to communicate with others, and by stereotyped behavior patterns.â auÂ·tisÂ·tic \oÌ-Ëtis-tik\ adjective or noun. a variable developmental disorder that appears by age three and is characterized by impairment of the ability to form normal social relationships, by impairment of the ability to communicate with others, and by stereotyped behavior patterns.
Other organizations have established a variety of alternative definitions for their standard reference conditions. In chemistry, IUPAC has established two standards: standard temperature and pressure (STP) as a temperature of 273.15 K (0 Â°C, 32 Â°F) and an absolute pressure of exactly 100 kPa (1 bar).
You can take a temperature using the mouth (oral), anus (rectal), armpit (axillary), or ear (tympanic). But the temperature readings vary depending on which one you use, and you need an accurate body temperature to determine if a fever is present. The average normal oral temperature is 98.6Â°F (37Â°C) . 2  A rectal temperature is 0.5Â°F (0.3Â°C) to 1Â°F (0.6Â°C) higher than an oral temperature. 3  An ear (tympanic) temperature is 0.5Â°F (0.3Â°C) to 1Â°F (0.6Â°C) higher than an oral temperature.