Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
cirrus, i, m. (used mostly in plur.), 
- I. a (natural) lock, curl, ringlet, or tuft of hair (rare): cirri, Varr. ap. Non. p. 94, 21; Mart. 10, 83.
Sing.: cirrus, Juv. 13, 165.
Also, the hair on the forehead of a horse, Veg. 2, 28, 34; 6, 2, 1. 
- II.  Transf. 
 
- A.  A tuft of feathers or crest of birds, Plin. 11, 37, 44, § 122.
 
- B.  The arms of polypi, Plin. 9, 28, 44, § 83; 25, 7, 33, § 70; 26, 8, 37, § 58.
 
- C.  Filaments of plants similar to tufts of hair, Plin. 26, 7, 20, § 36; 27, 4, 9, § 25.
 
- D.  A fringe upon a tunic, Phaedr. 2, 5, 13; cf. cirratus, II.