What is "vermiculating"

Vermiculate \Ver*mic"u*late\, v. t. [imp. & p. p. Vermiculated; p. pr. & vb. n. Vermiculating.] [L. vermiculatus inlaid so as to resemble the tracks of worms, p. p. of vermiculari to be full of worms, vermiculus a little worm. See Vermicular.] To form or work, as by inlaying, with irregular lines or impressions resembling the tracks of worms, or appearing as if formed by the motion of worms.

vb. (present participle of vermiculate English)