Etymology Create Talk0 Category page This page needs content. You can help by adding a sentence or a photo! Add to this page! “Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual... Etymology “Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual... Placebo (origins of technical term) “The word endogenous means "arising from within", the opposite of exogenous. An emotion or... Endogeny Pages in category "Etymology" The following 3 pages are in this category, out of 3 total. E EndogenyEtymologyP Placebo (origins of technical term)