*toroidal* (adj): in the shape of a torus; donut-shaped. *tor-oid-al.* From the Cosmology episode of *Ologies.*

*monomial* (adj): an algebraic expression consisting of one term, the atomic unit of which polynomials are made. Contrasted with a *binomial*, *trinomial*, etc. Variant: *mononomial*. Unclear whether the *-al* is actually separable; the OED lists the etyma as *mono*– ‘one’ and *nomial*. Came up in a discussion of this shader; calculating the distance to an ellipse requires solving a 4th-degree equation (*quartic polynomial*); the solution allows the polynomial to be simplified into the product of a set of monomials.

*galaxial* (adj): Having to do with a galaxy. *Galaxy-al. *From *Ologies.*

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