Definition of "labdanum"

Your onely way to make a good pomander, is this. Take an ownce of the pureſt garden mould, clenſed and ſteeped ſeauen daies in change of motherleſſe roſe water, then take the beſt Labdanum, Benioine, both Storaxes, amber greece, and Ciuet, and muſke, incorporate them together, and work them into what form you pleaſe; this, if your breath bee not to valiant, will make you ſmell as ſweete as my Ladies dogge.

1607, [attributed to Thomas Tomkis], Lingva: Or The Combat of the Tongue, and the Five Senses for Superiority. A Pleasant Comœdie., London: Printed by G[eorge] Eld, for Simon Waterson, act IV, scene iii

Aromatics were used, too, especially in necromancy, and an old recipe of that sort comprises Musk, Myrrh, Frankincense, Red Storax, Mastick, Olibanum, Saffron, Benzoin and Labdanum.

1936, Rollo Ahmed, The Black Art, London: Long, page 112

(A chypre perfume is usually built with oak moss, patchouli and labdanum, an absolute of a dark, thick-smelling Mediterranean bush.)

2007 August 26, Chandler Burr, “Back in Print”, in New York Times‎