helicteres isora
- n East Indian shrub often cultivated for its hairy leaves and orange-red flowers
helichrysum
- n large genus of mostly African and Australian herbs and shrubs: everlasting flowers; in some classifications includes genus Ozothamnus
helichrysum bracteatum
- n Australian plant naturalized in Spain having flowers of lemon yellow to deep gold; the frequent choice of those who love dried flowers
helichrysum secundiflorum
- n shrub with white woolly branches and woolly leaves having fragrant flowers forming long sprays; flowers suitable for drying; sometimes placed in genus Helichrysum
helicidae
- n land snails including the common edible snail and some pests
helicopter
- n an aircraft without wings that obtains its lift from the rotation of overhead blades
helicteres
- n genus of shrubs and small trees of tropical America and Asia having cylindrical fruits spirally twisted around one another
heliobacter
- n a genus of helical or curved or straight aerobic bacteria with rounded ends and multiple flagella; found in the gastric mucosa of primates (including humans)
heliobacter pylori
- n the type species of genus Heliobacter; produces urease and is associated with several gastroduodenal diseases (including gastritis and gastric ulcers and duodenal ulcers and other peptic ulcers)
heliocentric parallax
- n the parallax of a celestial body using two points in the earth's orbit around the sun as the baseline