Technical (10)
I believe the answer is:
scientific
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">technical</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for scientific that I've seen before include "As experiment" , "Systematic; methodical" , "using what's proven" , "Trained in biology, perhaps" , "Based on observation" .)