Haplotype analylsis. Molecular genetic testing to identify a set of closely linked segments of DNA.
Health Maintenance Organization (HMO). A type of health insurance plan that usually limits coverage to care from doctors who work for or contract with the HMO. It generally won’t cover out-of-network care except in an emergency.
Heterotropia. Inability of one eye to attain binocular vision with the other because of imbalance of the muscles of the eyeball--called also strabismus, squint.
Hydramnios. Excessive amniotic fluid build-up during pregnancy.
Hyperkalemia. A greater than normal concentration of potassium ions in the circulating blood.
Hyperostosis. Excessive growth of bony tissue.
Hypersomnia. Excessive daytime sleepiness.
Hypertrophy. General increase in bulk or a part of an organ.
Hypothermia. A body temperature significantly below 98.6.
Hypotonia. Low muscle tone causing floppiness, as in a child with the congenital form of myotonic dystrophy.