Why was "tantrum" trending last week?
1580s, from Middle French dissection, from Medieval Latin dissectionem (nominative dissectio), noun of action from past participle stem of Latin dissecare "cut in pieces," from dis- "apart" (see dis-) + secare "to cut" (see section).
dissection dis·sec·tion (dĭ-sěk'shən, dī-)n.
The act or an instance of dissecting.
Something that has been dissected, such as a tissue specimen under study.