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gene 1 today a section of a chromosome that determines the structure of a single protein or part of one, thereby influencing a particular hereditary characteristic, such as eye color, or a particular biochemical reaction. Main Adv.
adjustment 1 today the act or process of adjusting. [3 definitions] Main Adv.
concentrated 1 today intensely focused. [3 definitions] Main Adv.
touch-and-go 1 today insecure or uncertain; precarious; risky. Main Adv.
emotion 1 today a strong feeling such as joy, hatred, sorrow, or fear. When one feels an emotion, there are physical changes such as an increase in pulse, crying, or trembling. [2 definitions] Kids Ch.
tether 1 today a rope, chain, or leash for tying up or holding something that moves. [2 definitions] Kids Ch.