opotherapy (??p????r?p?) n another name for organotherapyCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014opotherapythe treatment of illness and disease with extracts made from certain glands of animals, as the thyroid or adrenal glands. Also called organotherapy.See also: Medical Specialties, Remedies-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.