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ther·mo·la·bile .thər-mō-'lā-.bīl, -bəl adj unstable when heated specif subject to loss of characteristic properties on being heated to or above 55°C <\thermolabile enzymes and vitamins>
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ther·mo·la·bile (thur″mo-laґbəl) (-laґbīl) easily altered or decomposed by heat; called also heat labile.Medical dictionary. 2011.