The Collaborative International Dictionary
Obtrectation
Obtrectation \Ob`trec*ta"tion\, n. [L. obtrectatio, from
obtrectare to detract from through envy. See Detract.]
Slander; detraction; calumny. [Obs.]
--Barrow.
Wiktionary
obtrectation
n. (context obsolete English) disparagement, the belittling of someone or something; slander. (16th-18th c.)