Symbolic Expressions

Words:  77 (16×15 grid)

Average Length:  5.14

Difficulty:  2-4 out of 5

The difficulty range depends on whether certain mathematical/physical symbols are all Greek to you.  Helpful hints/spoilers for the theme answers are below the photo.   I hope you enjoy the puzzle.  Next week (11/14) brings a challenging Themeless.

puz | pdf | solution

Ruins of the Library at 38 Down


19A:  Psi is the symbol for the wave function.

26A:  Lambda is the symbol for wavelength

57A:  Rho is the symbol for density

60A:  Nu is the symbol for degrees of freedom