agarwood, trees of the genus Aquilaria, especially the species Aquilaria malaccensis
c. 1380 "Geoffrey Chaucer's Troilus and Criseyde." In the digital collection Corpus of Middle English Prose and Verse, University of Michigan Library Digital Collections. Book IV, line 1135ff.
The woful teeris that they leten falle
As bittre weren out of teris kynde,
ffor peyne, as is ligne aloes or galle:
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