Largest
Robert P. Munafo, 2012 Apr 16.
The term "larger" is sometimes used in this encyclopedia to refer to a relationship between muatoms that are siblings: A muatom is "larger" if it has a lower period. The word is used in this way on the pages: binary search for internal angle, internal angle, larger neighbor, neighbors, and secondary continental muatom. The "larger neighbor" term is also used elsewhere, e.g. Farey addition. See also smaller.
R2.1/3a is "larger" than R2.2/5a because it has a lower period
For more examples of larger neighbors, see the table in the secondary continental muatom article.
Being "larger" in this sense does not necessarily mean that a muatom is physically larger: for example, R2.3/8a is physically larger than R2.1/7a, but is smaller in the sense meant here, because it has a higher period.

In the images above, both muunits are shown at the same scale (image width and height are 0.1 units on the real and imaginary axis respectively). But the muatom with the lower period is also physically smaller. This is a counterexample to the ordinary rule that siblings with a lower period are physically larger. The discrepancy is accounted for by the sin(2π N/M) term in the "Milnor's approximation" formula shown in the secondary continental muatom article.
From the Mandelbrot Set Glossary and Encyclopedia, by Robert Munafo, (c) 19872018. Muency index
This page was written in the "embarrassingly readable" markup language RHTF, and was last updated on 2018 Feb 04. s.11