| arthro- or (before a vowel) arthr- | |
| —combining form | |
| indicating a joint: arthritis; arthropod | |
| [from Greek arthron] | |
| arthr- or (before a vowel) arthr- | |
| —combining form | |
| [from Greek arthron] | |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
arthro- or arthr-
pref.
Joint: arthropathy.