definition of grice

In the post at logicandlanguage about Harman (see previous post here), I found a link to the Philosophical Lexicon, which defines grice thus:

grice, n. Conceptual intricacy.
"His examination of Hume is distinguished by
erudition and grice." Hence, griceful, adj.
and griceless, adj. "An obvious and griceless
polemic." pl. grouse: A multiplicity of
grice, fragmenting into great details, often in reply to
an original grice note.