1) Imbrication 2) Lapping 3) Related 1) Related 2) Related to 
<cell biology> In cell locomotion situation in which the leading lamella of one cell moves actively over the dorsal surface of another cell should be distinguished from underlapping. ... (18 Nov 1997) ... 
In cell locomotion, the situation in which the leading lamella of one cell moves actively over the dorsal surface of another cell - should be distinguished from underlapping.
[adj] - related by having something in common with or coinciding with
a means of conveying the illusion of depth by having one thing overlap, or partly cover, another.
adjective related by having something in common with or coinciding with; `having overlapping duties`; `found unexpected overlapping areas of interest`