hairdo has definitions from the field of zoology
1
[ noun ] (zoology) the arrangement of the hair (especially a woman's hair)

Synonyms

coiffure hair_style

Used in print

(David Boroff, "Jewish Teen-Age Culture"...)

The girls are prone to dress far more flamboyantly than their counterparts out of town , and eye_shadow , mascara , and elaborate bouffant hairdos - despite the admonitions of cautious guidance personnel - are not unknown even in early morning classes .

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