sup squark

s- +‎ up +‎ squark, from up quark.

sup squark (plural sup squarks)

1. (physics) A squark which is the hypothetical supersymmetric partner of an up quark.
   Symbol: ${\displaystyle {\tilde {u}}}$

Note the s- prefix on both words.

(squarks) squark; sup squark, sdown squark, scharm squark, sstrange squark, stop squark, sbottom squark ^{(Category: en:Squarks)}