"I for one would prefer to place my trust in the work of professional lexicographers"
So do I.
"1 : bearing a cirrus. 2 : curled like a cirrus —used especially of a leaf tipped with a tendril." (Merriam-Webster)
"Biology: bearing or resembling cirri" (Collins)
"Biology. Having or resembling a cirrus or cirri." (The Free Dictionary)
Absolutely every other dictionary I've checked gives only the biological definition. The entry in Chambers is unfortunately ambiguous, and it looks as though the setter picked the wrong meaning without cross-checking it against other sources.
If definitions were routinely cross-checked, this sort of thing wouldn't happen. No dictionary is the ultimate authority on anything.