Answer: gamma

AnswerCrossword Clue
GAMMAThird Greek letter.
GAMMAThird-brightest star in a constellation
GAMMASecond Greek consonant
GAMMAType of ray
GAMMALetter before delta
GAMMA... globulin
GAMMAThird of a series
GAMMA.. ray
GAMMAConstellation's third-brightest star
GAMMAFrat letter
GAMMAGreek letter.
GAMMAGreek C
GAMMAType of rays used to examine metal for defects.
GAMMAThird of a series.
GAMMAThird in any series.
GAMMA... globulin.
GAMMABefore delta.
GAMMAAfter beta.
GAMMAType of ray.
GAMMAKappa Kappa ....
gammacrogram
GAMMAHarmful ray type
GAMMABeta follower
GAMMAType of radiation
GAMMARay type
GAMMA.. globulin
GAMMAThird caste in "Brave New World"
GAMMAThird in a Greek series
GAMMAKind of ray
GAMMAGreek third
GAMMADelta preceder
GAMMAThird letter in the Greek alphabet
GAMMAKind of ray emitted by a supernova
GAMMAThird in a sequence
GAMMAEnglish : C :: Greek : ..
GAMMALetter after beta
GAMMAThird Greek letter
GAMMABeta's follower
GAMMAGreek letter
GAMMASymbol of magnetic field strength