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psycho-

Origin

a combining form representing psyche (psychological) and psychological (psychoanalysis) in compound words.

Also, especially before a vowel, psych-.

Origin:
< Greek, combining form of psȳchḗ breath, spirit, soul, mind; akin to psȳ́chein to blow (see psykter)

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Psycho- is always a great word to know.

So is doohickey. Does it mean:

a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.

a gadget; dingus; thingumbob.

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Collins

World English Dictionary

psycho- or (sometimes before a vowel) psych-

—*combining form*
	indicating the mind or psychological or mental processes: psychology; psychogenesis; psychosomatic

[from Greek psukhē spirit, breath]

psych- or (sometimes before a vowel) psych-

—*combining form*

[from Greek psukhē spirit, breath]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline

Word Origin & History

psycho-

comb. form meaning "mind, mental," from Gk. psykho-, combining form of psykhe (see psyche).

American Heritage

Medical Dictionary

psycho- or psych-
pref.

Mind; mental: psychogenic.
Mental activities or processes: psychomotor.
Psychology; psychological: psychosocial.

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