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| ABO system |
a classification system for the inherited antigens found on the surface of human red blood cells, which determine compatibility for blood transfusions. |
| acid |
a chemical substance that dissolves in water, has a sour taste, and turns blue litmus paper red. [1/4 definitions] |
| agar |
a gelatinous substance derived from red marine algae, used esp. to solidify bacterial cultures and to thicken foods; agar-agar. |
| aloe |
any of a genus of mostly African plants that have thick, jagged leaves and bear red or yellow flowers. [1/2 definitions] |
| amaranth |
a plant having coarse leaves and bearing purple, green, or red clusters of small flowers, often grown as a food crop. [2/3 definitions] |
| American Beauty |
a type of hybrid rose that bears long-stemmed red flowers. |
| anemia |
a physical problem caused by having too few red blood cells or red blood cells that are not working in the right way. People with anemia may feel tired and weak. |
| anemic |
pertaining to or suffering from anemia, a condition resulting from a deficiency of red blood cells or hemoglobin and characterized by weakness, pallor, and difficulty in breathing. [1/2 definitions] |
| anemone |
a type of plant related to the buttercup that has large white, blue, purple, or red flowers. |
| ant |
a small insect, often red or black. Ants live in large groups in the ground. |
| Antares |
a red binary star in the constellation Scorpius, having a combined magnitude of 1.0. |
| anthocyanin |
any of a group of plant pigments ranging in color from red to blue. |
| apple |
a firm, round fruit with red, green, or yellow skin. Apples grow on trees. |
| Arabia |
a peninsula in southwest Asia between the Red Sea and the Persian Gulf. |
| Arabian Peninsula |
a peninsula in the Middle East on which lie the countries of Saudi Arabia, Yemen, Oman, United Arab Emirates, Qatar, Bahrain, and Kuwait. The peninsula lies between the Red Sea to the west and the Persian Gulf to the northeast. The Indian Ocean borders the peninsula on the southeast. |
| areca |
any of several tall palm trees of tropical Asia, such as the betel palm, having a smooth, slender trunk and feathery leaves and bearing red or orange nuts. [1/2 definitions] |
| Asia |
the largest continent. Asia is surrounded by the Pacific, Indian, and Arctic Oceans, the Red Sea, and eastern Europe. It is in the Eastern Hemisphere. |
| astilbe |
any plant of the genus Astilbe, having small red, white, or pink flowers. |
| auburn |
the color that comes from mixing brown and red paint. |
| aucuba |
an Asian evergreen shrub of the dogwood family that has variegated leaves and bears red berries. |
| azobenzene |
an orange-red, nonsoluble crystalline compound obtained from nitrobenzene, used in organic synthesis, as an insecticide, and in the making of dyes. |
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