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English word dissertation comes from Latin serere, Latin dissero, Latin dis-, Latin sero, Latin dissertare, and later Latin dissertatio ((spoken) dissertation, discourse, disquisition.)
serere (Latin)
dissero (Latin)
I examine, argue, discuss, treat I plant. I scatter or sow seed.
dis- (Latin)
Asunder, apart, in two. Reversal, removal. Utterly, exceedingly.
sero (Latin)
(figuratively) I found, establish; scatter, spread, disseminate; propagate; excite; cause, produce.. (of persons) I beget, bring forth, produce.. I sow, plant. I fasten (with a bolt), bar, bolt. At a late hour, late, tardily.. Too late. (figuratively) I join, interweave, connect; combine, compose, contrive.. I join or bind together; plait, interweave, interlace, entwine.
dissertare (Latin)
disserere (Latin)
dissertus (Latin)
dissertatio (Latin)
(spoken) dissertation, discourse, disquisition.
dissertation (English)
A formal exposition of a subject, especially a research paper that students write in order to complete the requirements for a doctoral degree; a thesis.. A lengthy lecture on a subject; a treatise; a discourse; a sermon.