centralize (v.)youdaoicibaDictYouDict
1795, "to bring to a center;" 1800, "come to a center," from central + -ize, on model of French centraliser (1790). A word from the French Revolution. Related: Centralized; centralizing.
Government should have a central point throughout its whole periphery. The state of the monthly expences amounted to four hundred millions; but within these seven months, it is reduced to one hundred and eighty millions. Such is the effect of the centralization of government; and the more we centralize it, the more we shall find our expenses decrease. [Saint-Just, "Discourse on the State of the Finances"]
lecture (n.)youdaoicibaDictYouDict
late 14c., "action of reading, that which is read," from Medieval Latin lectura "a reading, lecture," from Latin lectus, past participle of legere "to read," originally "to gather, collect, pick out, choose" (compare election), from PIE *leg- (1) "to pick together, gather, collect" (cognates: Greek legein "to say, tell, speak, declare," originally, in Homer, "to pick out, select, collect, enumerate;" lexis "speech, diction;" logos "word, speech, thought, account;" Latin lignum "wood, firewood," literally "that which is gathered").

To read is to "pick out words." Meaning "action of reading (a lesson) aloud" is from 1520s. That of "a discourse on a given subject before an audience for purposes of instruction" is from 1530s.
meditation (n.)youdaoicibaDictYouDict
c. 1200, "contemplation; devout preoccupation; devotions, prayer," from Old French meditacion "thought, reflection, study," and directly from Latin meditationem (nominative meditatio) "a thinking over, meditation," noun of action from past participle stem of meditari "to meditate, think over, reflect, consider," frequentative form from PIE root *med- "to measure, limit, consider, advise, take appropriate measures" (cognates: Greek medesthai "think about," medon "ruler;" Latin modus "measure, manner," modestus "moderate," modernus "modern," mederi "to heal," medicus "physician;" Sanskrit midiur "I judge, estimate;" Welsh meddwl "mind, thinking;" Gothic miton, Old English metan "to measure;" also see medical).

Meaning "discourse on a subject" is early 14c.; meaning "act of meditating, continuous calm thought upon some subject" is from late 14c. The Latin verb also had stronger senses: "plan, devise, practice, rehearse, study."
uranologyyoudaoicibaDictYouDict
"The study of the stars or the heavens; astronomy. Also: a treatise or discourse on this subject; an astronomical system. Now chiefly historical", Mid 18th cent.; earliest use found in Benjamin Martin (bap. 1705, d. 1782), lecturer on science and maker of scientific instruments. From urano- + -logy. Compare post-classical Latin uranologia, ouranologia, Middle French, French uranologie, Portuguese uranologia.
dissertateyoudaoicibaDictYouDict
"Discourse on a particular subject", Mid 18th century: from Latin dissertat-, from dissertare 'to continue to discuss'.