(adj): vs. nonreticulate), reticular -- (resembling or forming a network
(adj): designating or relating to a compound in which one component is physically enclosed within the crystal structure of another
(adj): vs. unenclosed) -- (closed in or surrounded or included within
citation, .....they were aware of clathrates, naturally occurring cagelike clusters of atoms that trap other atoms within them.5-Aug-08,NYTimes Science,p. D4,A Problem of Bubbles Frames an Olympic Design.