regimen

Etymology

Learned borrowing from Latin regimen (“guidance, direction, government, rule”). Doublet of regime.

noun

1. Orderly government; system of order; administration.
2. (medicine) Any regulation or remedy which is intended to produce beneficial effects by gradual operation.
   Seven or eight annual bloodings, and as many purgations — such was the common regimen the theory prescribed to ensure continuance of health[…] 1832, The Edinburgh Review, page 470
3. (grammar) object
   (3.) Verbs admit two kinds of regimen: the direct regimen and the indirect regimen. (4.) The direct regimen, or immediate object … (5.) The indirect regimen, or remote object [....] The Popular Educator. A Complete Encyclopaedia of Elementary, Advanced, and Technical Education. New and Revised Edition. Volume III., page 394 (Lessions in French.---LVIII. § 42.---Of Verbs)
   Active verbs express an action which an agent, called the nominative or subject, performs on an object or regimen, without the help of a preposition: as,--- Pierre aime Sophie, Peter loves Sophia. … Of the Object or Regimen of Verbs. 1828, J. V. Douville, The Speaking French Grammar, forming a series of sixty explanatory lessons, with colloquial essays, 3rd edition, London, page 84 & 315
   15. A verb is active in French when it expresses that an agent called nominative, or subject, performs an action on an object, or regimen, without the help of a preposition---as, Jean frappe Joseph, John strikes Joseph, &c. 1831, A. Bolmar, “A Book of the French Verbs, Wherein the Model Verbs, and Several of the Most Difficult Are Conjugated Affirmatively, Negatively, Interrogatively, an Negatively and Interrogatively.”, in A Book of the French Verbs, Wherein the Model Verbs, and Several of the Most Difficult Are Conjugated Affirmatively, Negatively, Interrogatively, an Negatively and Interrogatively. A New Edition, Philadelphia, published 1854, page 2
   Pronouns may be nominatives, and of the direct or indirect regimen. 1847, M. Josse, A Grammar of the Spanish Language with Practical Exercises. First Part, page 51
4. (grammar) A syntactical relation between words, as when one depends on another and is regulated by it in respect to case or mood; government.
5. (medicine, dated) Diet; limitations on the food that one eats, for health reasons.