empyreuma

from The Century Dictionary.

• noun In chem., the pungent disagreeable taste and odor of most animal or vegetable substances when burned in close vessels, or when subjected to destructive distillation.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) The peculiar smell and taste arising from products of decomposition of animal or vegetable substances when burnt in close vessels.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun obsolete, chemistry The peculiar smell and taste arising from products of decomposition of animal or vegetable substances when burnt in close vessels.