A prickly climbing plant with purple or pink flowers; also known as cleavers or goosegrass, scientifically Galium aparine.
From Old English 'chedlock,' possibly from 'ched' (to stick) + 'lock' (plant). The name references how the plant clings to clothing and fur.
Chedlock is so sticky because it's covered in tiny hooked hairs that grab onto animal fur and human clothing—this was nature's genius way of spreading seeds before humans invented velcro, which engineers literally reverse-engineered from chedlock's design.
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