I. ˈgribəl noun
( -s )
Etymology: origin unknown
dialect England : a young crab tree or blackthorn ; sometimes : a cutting from one
II. noun
( -s )
Etymology: probably diminutive of grub (II)
: a small marine isopod crustacean ( Limnoria lignorum or L. terebrans ) that burrows into and rapidly destroys submerged timber (as the piles of wharves) both in Europe and America