[{"Bold_text": "noun", "List Items": ["a state of prolonged unconsciousness, including a lack of response to stimuli, from which it is impossible to rouse a person."]}, {"Bold_text": "noun", "List Items": ["Astronomy.the nebulous envelope around the nucleus of a comet.", "Optics.a monochromatic aberration of a lens or other optical system in which the image from a point source cannot be brought into focus, the image of a point having the shape of a comet.", "Botany.a tuft of silky hairs at the end of a seed.the leafy crown of a tree; cluster of leaves at the end of a stem.a terminal cluster of bracts, as in the pineapple.", "a tuft of silky hairs at the end of a seed.", "the leafy crown of a tree; cluster of leaves at the end of a stem.", "a terminal cluster of bracts, as in the pineapple."]}]