| 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. |
| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |