Definition that contains vitamin a
- liver large and complicated reddish-brown glandular organ located in the upper right portion of the abdominal cavity; secretes bile and functions in metabolism of protein and carbohydrate and fat; synthesizes substances involved in the clotting of the blood; synthesizes vitamin A; detoxifies poisonous substances and breaks down worn-out erythrocytes
- carotene an orange isomer of an unsaturated hydrocarbon found in many plants; is converted into vitamin A in the liver
- sir walter norman haworth English biochemist who was a pioneer in research on carbohydrates; when he synthesized vitamin C he became the first person to synthesize a vitamin artificially (1883-1950)
- conjunctivitis arida abnormal dryness of the conjunctiva and cornea of the eyes; may be due to a systemic deficiency of vitamin A
- xeroma abnormal dryness of the conjunctiva and cornea of the eyes; may be due to a systemic deficiency of vitamin A
- keratomalacia softening and drying and ulceration of the cornea resulting from vitamin A deficiency; symptom of cystic fibrosis or sprue
- provitamin a an orange isomer of an unsaturated hydrocarbon found in many plants; is converted into vitamin A in the liver
- nyctalopia inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder
- soupfin Pacific shark valued for its fins (used by Chinese in soup) and liver (rich in vitamin A)
- dehydroretinol a viscous alcohol that is less active in mammals than is vitamin A1