noun, masculine/fo.buʁ.dɔ̃/plural: faux-bourdons
drone (bee); a musical style in which a countermelody sung above the melody and another sung below create the impression of a bass that isn't really there
“Les abeilles dites Frère Adam ont d’abord grandi dans une nurserie et sont issues d’une reine et d’un faux-bourdon.” — The so-called Brother Adam bees first grew up in a nursery and came from a queen and a drone.