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(in′star″) [L. instar, image, likeness] Any one of the various stages of development of an insect or other arthropod during successive molts.


(in′step″) The arched, upper, medial portion of the foot.


integrase inhibitor.


(in′stĭ-lāt″) [L. instillare, to drip into] A fluid infused into, dripped on, or injected into a body part.


(ĭn″stĭl-ā′shŭn) [L. in, into, stillare, to drop] Slowly pouring or dropping a liquid into a cavity or onto a surface. instill, v.


(in′stingkt″) [L. instinctus, instigation] An inherited tendency to react to an environmental stimulus in a predictable but limited fashion.

death i. In psychoanalytic theory, the unconscious will to destroy oneself or die.

herd i. The desire to be associated with a group.

Institute of Electrical and Electronic Engineers

ABBR: IEEE. An organization partially responsible for standards regulating electrical devices and equipment.

Institute for Safe Medication Practices

ABBR: ISMP. A nonprofit organization devoted to the prevention of errors in medication and to the use of safe medications. It disseminates information about adverse drug events to health care professionals, institutions, and the public. It also operates the Medication Errors Reporting System. Website:

Institute of Medicine

ABBR: IOM. SEE: National Academy of Medicine. institutional ethics committee Patient care advisory committee.


(in″stĭ-too′shŏn-ăl-īz″) 1. To place for an extended period in a residence in or confinement to a nursing home, or other long-term care setting, or prison. 2. To arrange for a person to be placed in such a facility. 3. To make people who live together in such a facility gradually develop common patterns of behavior and thought frequently associated with residing in nursing homes, e.g., illness, depression, and apathy.

The current movement in medicine and nursing is away from institutionalism to a more homelike environment. institutionalization (in″stĭ-too″shŏn-ăl-ĭ-zā′shŏn), v. institutionalized (in″stĭ-too″shŏn-ăl-īzd′), adj.


(in-strŭk′shŏn) [L. instruere, to draw up, train] 1. A direction or command. 2. The act of teaching or furnishing information. instructional (in-strŭ k shŏn-ăl), adj.

computer-assisted i. ABBR: CAI. Computer-based instructional programs for individual learners. The term most often refers to drill and practice, tutorial, or simulation exercises used as stand-alone instruction or as supplementary materials. A more recent term is e-learning.

dental hygiene i. A program in which patients are taught the methods of oral hygiene and the importance of ...

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