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Related to anesthetically: aesthetically
an·es·thet·icalso an·aes·thet·ic (ăn′ĭs-thĕt′ĭk)
1. Relating to or resembling anesthesia.
2. Causing anesthesia.
1. An agent that causes loss of sensation with or without the loss of consciousness.
2. Something likened to this in effect: For some people watching television is an anesthetic for the mind.
[From Greek anaisthētos, without feeling : an-, without; see a-1 + aisthētos, perceptible (from aisthanesthai, to feel; see anesthesia).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
the usual US spelling of anaesthetically
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014