dottle

n [U] partly burnt tobacco left in a pipe after smoking （烟斗中吸剩的）残烟丝.

dormitory, dormitory town, dormouse, dorsal, dory, DOS, dosage, dose, doss, doss-house, dosser, dossier, dot, dot matrix, dotage, dote, doting, dotingly, dotted line, dottiness, dotty, double, double agent, double back, double bed, double bill, double bind, double bluff, double chin, double cream, double date, double Dutch, double entendre, double entry, double figures, double first, double pneumonia, double standard, double take, double time,