Final answer:
The word 'gracilis' translates to 'thin' in English and is commonly used in biology to describe a slender structure or organism.
Step-by-step explanation:
The correct translation for the word gracilis is thin. This term is commonly used in biology to describe a structure or organism that is slender, delicate, or slim. For example, the gracilis muscle in humans is a long and slender muscle located in the thigh.
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