Noun | 1. | Centunculus - a dicotyledonous genus of the family Primulaceae dicot genus, magnoliopsid genus - genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination family Primulaceae, primrose family, Primulaceae - a dicotyledonous family of the order Primulales with a regular flower; widely distributed in the northern hemisphere chaffweed, false pimpernel - weedy plant having short dry chafflike leaves |