ar·mil·lar·y sphere 
(ärmə-lĕr′ē, är-mĭlə-rē)
(ärmə-lĕr′ē, är-mĭlə-rē)n.
An old astronomical model with solid, usually metal rings, all great circles of a single sphere, used to display relationships among the principal celestial circles.
[Translation of French sphère armillaire, from Latin armilla, bracelet, from armus, shoulder; see ar- in the Appendix of Indo-European roots.]
armillary sphereby Adam Heroldt
(active 1616-1649)
- punditocracy
- punditry
- Pune
- adorner
- adornment
- Adowa
- Adowa
- ADP
- ad rem
- adrenal
- adrenal cortex
- adrenalectomy
- adrenal gland
- adrenaline
- adrenalize
- adrenally
- adrenal medulla
- adrenergic
- adrenergically
- adrenochrome
- adrenocortical
- adrenocorticosteroid
- adrenocorticotrophic
- adrenocorticotrophic hormone
- adrenocorticotrophin