potence

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potence.
1. T- or ⌈-shaped element like a crutch, used as a gibbet, support, etc.

2. Type of cross, known more correctly as a potent cross (see cross).

3. Revolving structure inside a circular columbier, columbarium, or dovecote, to enable all the niches to be reached with ease.

4. Any stud supporting a bearing.