back-to-back stem-and-leaf plot a variation of a stem-and-l...
sensorimotor stage in Piagetian theory, the first major sta...
PPFA abbreviation for Planned Parenthood Federation of Amer...
Crocker–Henderson odor system a theory that posits four pri...
Puerto Rican syndrome see mal de pelea.
overcrowding n. a higher concentration of organisms per uni...