| THETA | 8th Greek letter |
| THETA | Angle denoter, in math |
| THETA | Angle measurement symbol |
| THETA | Angle symbol |
| THETA | Angle symbol in geometry |
| THETA | Angle symbol, in math |
| THETA | Angle symbol, in trigonometry |
| THETA | Angle symbol, in trigonometry (rhymes with "zeta") |
| THETA | Angle variable |
| THETA | Article thanks to foreign character |
| THETA | Brain wave between four and eight hertz |
| THETA | Certain sorority member |
| THETA | Certain sorority woman |
| THETA | Consonant before iota |
| THETA | Delta Sigma ___ (sorority founded at Howard University) |
| THETA | Delta Sigma ___ (sorority) |
| THETA | Eight Greek letter (Θ, θ) |
| THETA | Eighth Greek letter |
| THETA | Eighth greek letter |
| THETA | Eighth in a series |
| THETA | Eighth in an alphabet series |
| THETA | Eighth letter |
| THETA | Eighth letter of the Greek alphabet |
| THETA | Eighth letter out of 24 |
| THETA | Eighth of 24 |
| THETA | Eta follower |
| THETA | Eta-iota link |
| THETA | First letter in "Thanatos" |
| THETA | Frat letter |
| THETA | Frat row letter |
| THETA | Fraternity letter |
| THETA | Geometry class symbol |
| THETA | Gr. letter |
| THETA | Greek consonant |
| THETA | Greek letter |
| THETA | Greek letter after (and rhyming with) eta |
| THETA | Greek letter after eta |
| THETA | Greek letter associated with angles |
| THETA | Greek letter before iota |
| THETA | Greek letter between Eta and Iota |
| THETA | Greek letter between eta and iota |
| THETA | Greek letter for an angle |
| THETA | Greek letter in geometric angles |
| THETA | Greek letter in geometry class |
| THETA | Greek letter often seen in trigonometry |
| THETA | Greek letter resembling a bisected "0" |
| THETA | Greek letter that may represent an angle |
| THETA | Greek letter that rhymes with "beta" |
| THETA | Greek letter that rhymes with beta and zeta |
| THETA | Greek letter that rhymes with the one before it |
| THETA | Greek letter traditionally associated with Earth Day |
| THETA | Greek letter used for an angle |
| THETA | Greek letter used in geometry |
| THETA | Greek letter used in trigonometry |
| THETA | Greek symbol for plane angles |
| THETA | Head of Thermopylae? |
| THETA | Iota follows it |
| THETA | Iota preceder |
| THETA | Iota's preceder |
| THETA | It comes before iota |
| THETA | It's between eta and iota |
| THETA | Kappa Alpha ___ (first Greek-letter fraternity for women) |
| THETA | Kind of radiation, in science fiction |
| THETA | Letter accompanying sin? |
| THETA | Letter after eta |
| THETA | Letter before 12-Across |
| THETA | Letter before 23-Across |
| THETA | Letter before 29-Down |
| THETA | Letter before iota |
| THETA | Letter before iota in the Greek alphabet |
| THETA | Letter between eta and iota |
| THETA | Letter found between two vowels in the alphabet |
| THETA | Letter in the Greek spelling of Athens |
| THETA | Letter on fraternity row |
| THETA | Letter that represents an unknown parameter, in statistics |
| THETA | Letter that rhymes with, and follows, zeta and eta |
| THETA | Letter that was derived from the Phoenician letter teth |
| THETA | Letter used to label an angle |
| THETA | Mu Alpha ___ (math honor society) |
| THETA | Oval letter with a line through the middle |
| THETA | Plane angle symbol |
| THETA | Precedes iota |
| THETA | Second letter in the Greek for "Athens" |
| THETA | See 22-Across |
| THETA | Sorority letter |
| THETA | Symbol for a plane angle, in geometry |
| THETA | Symbol for an angle in math |
| THETA | Symbol for an angle in trigonometry |
| THETA | Symbol for an angle, in math |
| THETA | Symbol for death in ancient Athens |
| THETA | Symbol in trigonometry |
| THETA | Symbol used for potential temperature in meteorology |
| THETA | Temperature symbol |
| THETA | Third letter after epsilon |
| THETA | This Greek letter: θ |
| THETA | Thucydides had one |
| THETA | Trig angle symbol |
| THETA | Type of brain wave that researchers can easily see in the hippocampus of rats |
| THETA | Variable representing an angle, in math |
| THETA | __ rhythm: brain waves pattern |