1. harmless substance given as dummy medicine.   transition   prototype   placebo   momentum   Hint Half-n-half Clue   2. observed fact or occurrence subject to scientific study.   metamorphosis   yield   phenomenon   residue   Half-n-half Clue   3. size or extent.   pachyderm   magnitude   psychosis   lumen   Half-n-half Clue   4. vertebrate animal whose female suckles the young.   symbiosis   penumbra   mammal   transition   Half-n-half Clue   5. very tiny quantity.   precipitant   iota   marsupial   plasticity   Half-n-half Clue   6. change of form, character or circumstances.   pestle   metamorphosis   prototype   indices   Half-n-half Clue   7. point in moon's orbit nearest from earth.   increment   patina   parameter   perigee   Half-n-half Clue