Etymology
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parenteral (adj.)

"involving the introduction of a substance into the body other than by the alimentary tract," 1905, from para- (1) + Greek enteron "intestine" (see enteric).

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total (n.)
"whole amount, sum," 1550s, from total (adj.).
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total (adj.)
late 14c., from Old French total (14c.), from Medieval Latin totalis "entire, total" (as in summa totalis "sum total"), from Latin totus "all, all at once, the whole, entire, altogether," a word of unknown origin. Total war is attested from 1937 (William Shirer), in reference to a concept developed in Germany.
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total (v.)
1716, "bring to a total," from total (n.). Intransitive sense "reach a total of" is from 1859. Meaning "to destroy one's car" first recorded 1954. Related: Totaled; totaling.
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nutrition (n.)

1550s, "act or process by which organisms absorb their proper food into their systems and build it into living tissue," from Old French nutrition (14c.) and directly from Latin nutritionem (nominative nutritio) "a nourishing," noun of action from past-participle stem of nutrire "to nourish, suckle, feed," from PIE *nu-tri-, suffixed form (with feminine agent suffix) of *(s)nau- "to swim, flow, let flow," hence "to suckle," extended form of root *sna- "to swim." Meaning "that which nourishes, nutriment" is from c. 1600. Related: Nutritional.

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nutritionist (n.)

"one whose profession is advising on matters of food and nutrition and their effect on health," 1926, from nutrition + -ist.

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malnutrition (n.)

"defect of sustenance from imperfect assimilation of food," 1843, from mal- + nutrition.

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malassimilation (n.)

also mal-assimilation, "faulty digestion, imperfect nutrition," 1840, from mal- + assimilation.

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trophic (adj.)
"of or pertaining to nutrition, food, or nourishment," 1856, from Greek trophikos, from trophe "nourishment, food" (see -trophy).
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malnourished (adj.)

"suffering from insufficient nutrition," 1906, from mal- "bad, badly" + nourished (see nourish).

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