• Anatomical interstice
• Anatomical ring
• Biological ring
• Biological ring of color
• Biological ring of color (Var.)
• Botanical ring of color
• Botanical space
• Bump on a cactus
• Cactus bud
• Cactus feature
• Cactus ring
• Cactus spine source
• Colored ring, in botany
• Eye part: var.
• Interstice
• Interstice in a leaf
• Iris part
• Iris ring
• Leaf interstice
• Nipple ring (Var.)
• Part of the iris surrounding the pupil
• Prickly area of a prickly pear
• Ring around the pupil
• Ring of anatomy
• Ring of color
• Ring of color (Var.)
• Small cavity
• Small cavity, as around a cactus spine
• Small interstice
• Small pit
• Small space
• Space between leaf veins
• Space on a butterfly's wing
• Spine-bearing structure on a cactus
• Tiny open space
• Tissue connector
• Tissue gap