any of numerous carnivorous or bloodsucking usually freshwater annelid worms (class Hirudinea) that have typically a flattened lanceolate segmented body with a sucker at each end

http://id.loc.gov/authorities/subjects/sh85075689

“Leech.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/leech. Accessed 20 Aug. 2026.