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Ethereal (adjective)
Pertaining to the hypothetical upper, purer air, or to the higher regions beyond the earth or beyond the atmosphere; celestial; otherworldly.
“ethereal space”
“ethereal regions”
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Ethereal (adjective)
Consisting of ether; hence, exceedingly light or airy; tenuous; spiritlike; characterized by extreme delicacy, as form, manner, thought, etc.
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Ethereal (adjective)
Delicate, light and airy.
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Ethereal (adjective)
(chemistry) To do with ether.
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Ephemeral (noun)
Something which lasts for a short period of time.
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Ephemeral (adjective)
Lasting for a short period of time.
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Ephemeral (adjective)
Existing for only one day, as with some flowers, insects, and diseases.
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Ephemeral (adjective)
Usually dry, but filling with water for brief periods during and after precipitation.
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Ethereal (adjective)
extremely delicate and light in a way that seems not to be of this world
“her ethereal beauty”
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Ethereal (adjective)
heavenly or spiritual
“ethereal, otherworldly visions”
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Ethereal (adjective)
(of a solution) having diethyl ether as a solvent
“sodium is dissolved in ethereal solutions of aromatic ketones”
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Ephemeral (adjective)
lasting for a very short time
“fashions are ephemeral: new ones regularly drive out the old”
“works of more than ephemeral interest”
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Ephemeral (adjective)
(chiefly of plants) having a very short life cycle
“chickweed is an ephemeral weed, producing several generations in one season”
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Ephemeral (noun)
an ephemeral plant
“ephemerals avoid the periods of drought as seeds”