1. centrifuge   machine to separate substances by spinning.   opposite statement or position turned round.   absence of contradictions or uniformity.   division into two classes.   Hint Half-n-half Clue   2. conjecture   collarbone.   guesswork.   absence of contradictions or uniformity.   reduction in size.   Half-n-half Clue   3. corollary   proposition that follows without separate proof.   reduction in size.   purging of passage of body; outlet to emotion.   floating sheet of ice.   Half-n-half Clue   4. apothecary   ointment that helps in soothing pain.   druggist or chemist.   guesswork.   loss of speech.   Half-n-half Clue   5. dichotomy   division into two classes.   small pricking tool for piercing holes.   floating sheet of ice.   agent to speed up chemical reaction without it changing.   Half-n-half Clue   6. conifer   tree bearing fruit-cones.   lizard noted for changing color to surroundings.   ointment that helps in soothing pain.   animals of a region or era.   Half-n-half Clue   7. efficacy   constituent or element.   ability to produce desired effect.   correspondence or harmonious relation.   triangular tract of mud or sand at river's mouth.   Half-n-half Clue