"A caterpillar walking on the surface of a leaf is adjacent_to the leaf, if one of the caterpillar appendages is touching the leaf. In contrast, a butterfly flying close to a flower is not considered adjacent, unless there are any touching parts." . "The epidermis layer of a vertebrate is adjacent to the dermis." . . "The skin of the forelimb is adjacent to the skin of the torso if these are considered anatomical subdivisions with a defined border. Otherwise a relation such as continuous_with would be used." . . . "adjacent to"@en . "x adjacent to y if and only if x and y share a boundary." . "This relation acts as a join point with BSPO" . "Chris Mungall" . . "The plasma membrane of a cell is adjacent to the cytoplasm, and also to the cell lumen which the cytoplasm occupies." . . .