Boyd’s Bible Dictionary:
(fat). A gum-resin of yellowish color, and pungent, disagreeable odor when burning (Ex. 30:34).
Concise Bible Dictionary:
An ingredient in the compound that was burnt in the tabernacle as sweet incense (Ex. 30:34). It is not known from what plant or tree it was obtained. The galbanum of commerce is a resinous gum of a disagreeable odor.
Strong’s Dictionary of Hebrew Words:
Transliteration:
chelbnah
Meaning:
from 2459; galbanam, an odorous gum (as if fatty)