Crossword clues for X's 4 letters:TENSX, X, XMCCLXXV x X x VDVIIXIII x XIII x IIIOCHODos x dos x dosANONLike Mr. X, but not Malcolm XMMCLCCXV x XIHOPEatery with a "Two x Two x Two" optionMMDLCCLV x XZEROThe "x" in Euler's Identity: e^(i*pi) + 1 = xCDLVVII x XIII x VCLXVXI x III x VAREAFor a triangle, it's .5 x base x heightMCDLCXLV x XIHOPChain with a "2 x 2 x 2" breakfast comboCCCLXXXV x XMDLXXXXIX x XX x IIMMIXXLI x VII x VIIMCLXCXVI x XMMCM(D x IV) + (C x IX)AREA1/2 x base x height, for a triangleAREAL x W for a rectangleBIOSX profile featuresAREAThis equals L x WKISSWhat X may representUFOSX-Files vehiclesASINX _____ xylophoneILIAX-ray of the hips featureSPEXX-ray ___ (kids' goggles)UFOSThe X-Files transportsDANAScully of "The X-Files"PYROX-Men enemy who can control fireAXISx or y, e.g.DLIIXCII x VIUNIXOS X basisMDLIDXVII x IIIMDIIDCCLI x IICHISX'sASINX ___ xylophoneGMANThe X-Files extraCDIILXVII x VISETIThe X-Files grp.BLUEX-ratedBESOX in México?ZOOMBilly of XOREORITZ x ___ (cross-promotion cookie of 2022)ZULUFollower of X-ray and YankeeAXISx or y lineCECEGospel singer Winans or "X Factor" contestant FreyANONLike Mr. XMLIIDXXVI x II