What is "halones"

Halones \Ha*lo"nes\ (h[.a]*l[=o]"n[=e]z), n. pl. [NL., fr. Gr. "a`lwn, "a`lwnos, a halo.] (Biol.) Alternating transparent and opaque white rings which are seen outside the blastoderm, on the surface of the developing egg of the hen and other birds.

n. (context biology English) Alternating transparent and opaque white rings which are seen outside the blastoderm, on the surface of the developing egg of the hen and other birds.