ec·to·com·men·sal 
(ĕk′tə-kə-mĕnsəl)
(ĕk′tə-kə-mĕnsəl)n.
A commensal organism that lives on the outer body surface of another organism.
- openhandedness
- openhearted
- openheartedly
- openheartedness
- open-hearth
- open-heart surgery
- open house
- opening
- open interval
- open-label
- open letter
- open listing
- open loop
- openly
- open market
- open marriage
- open meeting law
- open mike
- open-minded
- open-mindedly
- open-mindedness
- open-mouthed
- open-mouthedly
- openness
- open (one's) eyes