A modal auxiliary verb, often simply called a modal verb or even just a modal, is used to change the meaning of other verbs (commonly known as main verbs) by expressing modalityâthat is, asserting (or denying) possibility, likelihood, ability, permission, obligation, or future intention.
Euthymia (medicine) Euthymia is a normal non-depressed, reasonably positive mood. It is distinguished from hyperthymia, which refers to an extremely happy mood, and dysthymia, which refers to a depressed mood. It is a term used frequently in mental status exams.
Freebase(0.00 / 0 votes)Rate this definition: Ectotherm. An ectotherm, from the Greek ÎµÎºÏÏÏ outside and Î¸ÎµÏÎ¼ÏÏ hot, is an organism in which internal physiological sources of heat are of relatively small or quite negligible importance in controlling body temperature. Such organisms rely on environmental heat sources, which permits them to operate at very economical metabolic rates.