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| delineate | to outline |
| emollient | softener |
| retrograde | moving backward |
| melancholy | dark sadness |
| intracranial | within the skull |
| cardiovascular | of the heart and vessels |
| epiphany | revelation |
| histology | study of living tissues |
| perihelion | orbital point nearest the sun |
| inherent | built-in |
| plutocracy | government of the wealthy |
| sine qua non | essential element |
| corpulent | full-bodied |
| dichotomy | two-part division |
| pathological | diseased |
| cryptic | having hidden meaning |
| isosceles | having two equal sides |
| pathogen | disease-causer |
| vociferous | loudly-voiced |
| rectify | correct |
| sanctimonious | affectedly holy |
| tortuous | twisting |
| rectilinear | right-angled |
| metamorphosis | change of shape |
| petroglyph | rock carving |