Hydropiper

Hy'dro·pi`per noun [ New Latin , from Greek 'y`dwr water + Latin piper a pepper.] (Botany) A species ( Polygonum Hydropiper ) of knotweed with acrid foliage; water pepper; smartweed.
Found on http://www.encyclo.co.uk/webster/H/77

Hydropiper

• (n.) A species (Polygonum Hydropiper) of knotweed with acrid foliage; water pepper; smartweed.
Found on http://thinkexist.com/dictionary/meaning/hydropiper/
No exact match found