Dacron  Polyester plastic. Also known as Terylene. (10)

Dip See Tuck (3)

Dog Laying the Working End of a rope back around itself with the lay, or another (larger) rope, several times. (10) Alternate, see Dogging

Dogging Whipping together the ends of two separate strands of rope to prevent them pulling out (of a splice) (4)

Double To follow lay (lead) of a rope in a decorative knot for an additional circuit. (3)

Draw Up To tighten a knot till it is firm enough to avoid slippage or Capsize. (8)

Draw-loop A loop left when the final tuck of a Working End is not pulled through a knot. See Slipped (5)

Dress To tighten and form a loosely tied knot preparatory to Snugging and tightening into its final form. (4)