Definition of chalkbrood
: a disease of honeybees that is fatal to developing larvae and is caused by a fungus (Ascophaera apis)
Note: Larva affected with chalkbrood become covered by a white, woolly growth and then harden to a chalky white to grayish-black mass.
Keep scrolling for more
Love words? Need even more definitions?Merriam-Webster unabridged
Words at Play
Ask the Editors