coral bells noun[plural only]2 •Heuchera sanguinea, a species of herbaceous perennial in the family Saxifragaceae, native to North America.A powdery mildew on coral bells was determined to be Sphaerotheca humuli var. fuliginea. […] Coral bells (Heuchera sanguinea) are grown commonly as perennial border or edging plants in California. — 1964 •Any of the plants of genus Heuchera.
