7 letters · 12 points in Scrabble
noun a taxonomist who classifies organisms into many groups on the basis of relatively minor characteristics
noun a person who separates something into parts or groups
noun a vertical structure that divides or separates (as a wall divides one room from another)
originPIE word *dwóh₁ From divide + -er.
Etymology from Wiktionary, CC BY-SA 3.0