horned rattlesnake
— Noun
– English
～ small pale-colored desert rattlesnake of southwestern United States; body moves in an s-shaped curve
heat ray
— Noun
– English
～ a ray that produces a thermal effect
hypersensitivity reaction
— Noun
– English
～ an inappropriate and excessive reaction to an allergen (as pollen or dust or animal hair or certain foods); severity ranges from mild allergy to severe systemic reactions leading to anaphylactic shock
heterodyne receiver
— Noun
– English
～ a radio receiver that combines a locally generated frequency with the carrier frequency to produce a supersonic signal that is demodulated and amplified
historical record
— Noun
– English
～ writing having historical value (as opposed to fiction or myth etc.)
HMG-CoA reductase
— Noun
– English
～ a liver enzyme that is responsible for producing cholesterol
hepatojugular reflux
— Noun
– English
～ a venous reflux occurring in congestive heart failure
Hyla regilla
— Noun
– English
～ the most commonly heard frog on the Pacific coast of America
head register
— Noun
– English
～ the higher ranges of the voice in speaking or singing; the vibrations of sung notes are felt in the head
Hippo Regius
— Noun
– English
～ an ancient Numidian town in northwestern Africa adjoining present-day Annaba in northeastern Algeria
Hans Conrad Julius Reiter
— Noun
– English
～ German bacteriologist who described a disease now known as Reiter's syndrome and who identified the spirochete that causes syphilis in humans (1881-1969)
human relationship
— Noun
– English
～ a relation between people; (`relationship' is often used where `relation' would serve, as in `the relationship between inflation and unemployment', but the preferred usage of `relationship' is for human relations or states of relatedness); "the relationship between mothers and their children"