Medical Definition of HPI. history of present illness.What made you want to look up HPI? Please tell us where you read or heard it (including the quote, if possible). View Seen & Heard Highlights from Around the Site. Test Your Vocabulary! Test Your Vocabulary!10 Charming Words for Nasty People.edical Definition of HPI. history of present illness.
parÂ·aÂ·sitÂ·oid. n. An organism, usually an insect, that lives on or in a host organism during some period of its development and eventually kills its host. parâ²aÂ·sitÂ·oidâ² adj.
3. host-an animal or plant that nourishes and supports a parasite; it does not benefit and is often harmed by the association. organism, being-a living thing that has (or can develop) the ability to act or function independently. intermediate host-a host that is used by a parasite in the course of its life cycle.ost. A cell or organism, such as a plant, animal, or alga, on or in which another organism lives or feeds. For example, a cat may be a host to fleas that feed on its blood, or a cell in the human respiratory tract may be a host to a flu virus.