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Webster 1913 Edition

Adj.

(Zool.)

Containing a body cavity;

as, the

cavitary

or nematoid worms

cavitary ‎(not comparable)

Of or pertaining to a (body) cavity.
- 2010, Siddhartha Mukherjee, The Emperor of all Maladies, Fourth Estate 2011, p. 151:
  With that sentence, Orman entered the unfamiliar world of oncology – swallowed, like his own lump, into the bizarre, cavitary universe of cancer.

of or pertaining to a body cavity