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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

process, procedure go
a particular course of action intended to achieve a result

medical procedure go
a procedure employed by medical or dental practitioners

operation, surgery, surgical operation, surgical procedure, surgical process go
a medical procedure involving an incision with instruments

brain surgery
any surgical procedure involving the brain

noun.act

2 Subcategories

psychosurgery go
brain surgery on human patients intended to relieve severe and otherwise intractable mental or behavioral problems
split-brain technique go
brain surgery on animals in which the corpus callosum (and sometimes the optic chiasm) is severed so that communication between the cerebral hemispheres is interrupted