1917, short for medical examination. Earlier it was colloquial for "a student or practitioner of medicine" (1823).
"pertaining or relating to the art or profession of healing or those who practice it," 1640s, from French médical, from Late Latin medicalis "of a physician," from Latin medicus "physician, surgeon, medical man" (n.); "healing, medicinal" (adj.), from medeor "to cure, heal," originally "know the best course for," from an early specialization of PIE root *med- "take appropriate measures" (source also of Avestan vi-mad- "physician"). "The meaning of medeor is based on a semantic shift from 'measure' to 'distribute a cure, heal'" [de Vaan]. The earlier adjective in English in this sense was medicinal. Related: Medically.
mid-14c., "rule, control," verbal noun from dress (v.). In some Middle English uses also short for addressing. In cookery, "sauce used in preparing a dish for the table," from c. 1500. Meaning "bandage applied to a wound or sore" is by 1713.
Dressing-gown "a loose and easy robe worn while applying makeup or doing the hair" is attested from 1777; dressing-room "room intended to be used for dressing" is from 1670s. Dressing-up "act or fact of attiring oneself with attention to style and fashion" is by 1852. Dressing-down (n.) "a reprimand" is by 1839, American English, originally "a thrashing," perhaps ironic or extended from some 19c. mechanical or commercial sense.
1530s, earliest in English in an obsolete sense "cover or bag for clothes," from French toilette "a cloth; a bag for clothes," diminutive of toile "cloth, net" (see toil (n.2)). Toilet acquired an association with upper class dressing by 18c., through the specific sense "a fine cloth cover on the dressing table for the articles spread upon it;" thence "the articles, collectively, used in dressing" (mirror, bottles, brushes, combs, etc.). Subsequent sense evolution in English (mostly following French uses) is to "act or process of dressing," especially the dressing and powdering of the hair (1680s); then "a dressing room" (1819), especially one with a lavatory attached; then "lavatory or porcelain plumbing fixture" (1895), an American euphemistic use.
Toilet paper is attested from 1884 (the Middle English equivalent was arse-wisp). Toilet training is recorded from 1940.
c. 1200, "action of dressing in clothes," verbal noun from clothe. From late 13c. as "clothes collectively, raiment, apparel;" 1590s as an adjective.
also garde-robe, "wardrobe," early 14c., from Old French garderobe "wardrobe; alcove; dressing-room" (Old North French warderobe; see wardrobe).