macrolensingn.
/ˌmakrəʊˈlɛnzɪŋ/, U.S. /ˈˌmækroʊˈlɛnzɪŋ/ Astronomy.
The refraction or focusing of electromagnetic radiation by the gravitational field of a diffuse astronomical object such as a galaxy or cluster, as opposed to that caused by a single discrete object such as a star or planet.
ΘΚΠ
the world > physical sensation > sight and vision > optical instruments > lens > [noun] > effects resembling those produced by lens
lensing1970
macrolensing1986
1986 B. Paczyński in Astrophysical Jrnl. 301 503/1 Throughout this paper the terms ‘macrolensing’ and ‘microlensing’ will be used to describe the effect of a galaxy as a whole and the effect of individual stars, respectively.
1988 Nature 17 Mar. 235/1 This model is different from the macrolensing or microlensing of explosive events.
1989 New Scientist 29 July 52/2 We call this effect ‘microlensing’ to contrast it with ‘macrolensing’ by the smoothed-out gravitational field of the entire galaxy.
This is a new entry (OED Third Edition, March 2000; most recently modified version published online March 2022).
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n.1986