tetrahydrocortisol

tetra tetrachloride tetracycline Tetris tetr- tetra (thiazyl fluoride) tetra base paper tetra paper tetra- tetra-alkyl ammonium hydroxide tetra-alkyl arsonium chloride tetra-alkyl lead

variable transformer variable valency variable voltage control variable word-length variable word-length computer variable working hours variable-area track variable-bandwidth filter variable-capacitance diode variable-capacitance transducer