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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

abstraction, abstract entity go
a general concept formed by extracting common features from specific examples

psychological feature go
a feature of the mental life of a living organism

event go
something that happens at a given place and time

act, deed, human action, human activity go
something that people do or cause to happen

activity go
any specific behavior

representation go
an activity that stands as an equivalent of something or results in an equivalent

pictorial representation, picturing go
visual representation as by photography or painting

imaging, tomography go
(medicine) obtaining pictures of the interior of the body

X-raying, X-radiation
obtaining images by the use of X rays

noun.act

1 Subcategories

computerized tomography, computed tomography, CT, computerized axial tomography, computed axial tomography, CAT go
a method of examining body organs by scanning them with X rays and using a computer to construct a series of cross-sectional scans along a single axis