† pentonenen.
Chemistry. Obsolete. rare.
= pentone n.
ΚΠ
1892 H. F. Morley & M. M. P. Muir Watts' Dict. Chem. (rev. ed.) III. 807/2 Pentonene... Occurs in oil deposited by compressed gas derived from bituminous shale.
This entry has been updated (OED Third Edition, September 2005; most recently modified version published online June 2018).
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n.1892