guru n. 1. in Hinduism and Sikhism, a spiritual...
PPA 1. abbreviation for parahippocampal place area. See par...
barotitis n. a disorder of the ear due to exposure to diffe...
acrophobia n. an excessive, irrational fear of heights, res...
trephination n. a surgical procedure in which a disk of bon...
DIN color system a European system for representing colors...