hyacinth
- n a red transparent variety of zircon used as a gemstone
- n any of numerous bulbous perennial herbs
hyacinth bean
- n perennial twining vine of Old World tropics having trifoliate leaves and racemes of fragrant purple pea-like flowers followed by maroon pods of edible seeds; grown as an ornamental and as a vegetable on the Indian subcontinent; sometimes placed in genus Dolichos
hyacinthaceae
- n one of many families or subfamilies in which some classification systems subdivide the Liliaceae but not widely accepted
hyacinthoides
- n small genus of perennial bulbs of western Europe and North Africa; sometimes placed in family Hyacinthaceae
hyacinthus candicans
- n southern African herb with white bell-shaped flowers
hyacinthus orientalis
- n widely grown for its fragrance and its white, pink, blue, or purplish flowers
hyacinthus orientalis albulus
- n hyacinth with loosely flowered spikes, several growing from one bulb
hyades
- n (Greek mythology) 7 daughters of Atlas and half-sisters of the Pleiades; they nurtured the infant Dionysus and Zeus placed them among the stars as a reward
hyaena
- n doglike nocturnal mammal of Africa and southern Asia that feeds chiefly on carrion
hyalin
- n a glassy translucent substance that occurs in hyaline cartilage or in certain skin conditions
hyaline cartilage
- n translucent cartilage that is common in joints and the respiratory passages; forms most of the fetal skeleton
hyaline membrane disease
- n an acute lung disease of the newborn (especially the premature newborn); lungs cannot expand because of a wetting agent is lacking; characterized by rapid shallow breathing and cyanosis and the formation of a glassy hyaline membrane over the alveoli