Denoting a colony of protozoa, each of which remains attached to another cell or to the main stem at one point, forming a branching or dendritic figure. ... Origin: L. Arbor, tree, + G. Eidos, resemblance ... (05 Mar 2000) ... 
Type: Term Pronunciation: ar′bōr-oyd Definitions: 1. Denoting a colony of protozoa, each of which remains attached to another cell or to the main stem at one point, forming a branching or dendritic figure.
arboroid Having a branching or treelike structure; said especially of colonies of certain protozoa.