gray·an·o·tox·in 
(grā′ănə-tŏk′sĭn)
(grā′ănə-tŏk′sĭn)n.
A neurotoxin found in the nectar of certain rhododendrons and related plants, such as some laurels of the genus Kalmia, and in unpasteurized honey produced from such nectar, and causing temporary effects such as nausea, vomiting, dizziness, and irregular heartbeat if ingested.
[New Latin (Leucothoē) grayāna, species name (after Asa Gray) + TOXIN.]