[f. prec. + -ITY.] Annular quality, condition or form.
1851–9. Airy, in Man. Sc. Enq., 4. The times of beginning and end of the annularity can be obtained accurately.
1869. J. Rogers, in Eng. Mech., 18 June, 286/1. The nebula in Lyra, the annularity of which was very apparent.
