12 letters · 18 points in Scrabble
originEtymology tree Proto-Indo-European *meh₂ḱ- Proto-Indo-European *-rós Proto-Indo-European *mh₂ḱrós Proto-Hellenic *makrós Ancient Greek μᾰκρός (măkrós)der. French macro-der. English macro- Proto-Italic *knuks Latin nux Latin nucleuslbor. English nucleus English macronucleus From macro- + nucleus.
Etymology from Wiktionary, CC BY-SA 3.0