We note also an almost complete absence of Egyptian words, though many cultured Greeks visited Egypt. Nevertheless, the latter looked with small favor on barbarisms of speech, and our word pyramid is one of the very few which they thus adopted. The term surgery is of very distinct Greek origin, and meant handwork as distinguished from the action of internal remedies. Medicine seems to be derived from _medeo_ to take care of, to provide, and physic and physician from _phusis_, i. e., nature. The physici were originally naturalists, or scientists, like Aristotle, medical science being but a part of their study. Campbell in his book ("The Language of Medicine") gives a list of at least two dozen common terms of to-day which were employed by Homer. In addition to these, many other Homeric terms are still in use, but with more or less altered or perverted meanings; for example, æther, when used in the sense of its being a narcotic agency; astragalus, which originally meant a die, since the analogous bones of the sheep were used for dice; amoeba, from _amoibe_, change or alteration, alluding to constant change of shape. Ammon originally meant a young lamb, iris a halo, meconium has reference to the juice of the poppy, from _mekon_, opium; molybdenum was so named from its resemblance to lead, narcosis originally meant numbness; the pleura was the side; the original phial was a saucer; the phalanges were so called because they were arranged side by side as it were in a phalanx; our troche was at first a wheel; and our tympanum was the original Greek drum, the word still persisting in musical terminology. The arteries were so named because they were supposed to contain air, while the veins were the gushers, from _phleo_, to gush or flow. The original confusion of nerves and tendons appears in the term aponeurosis. Long ago there were two rival medical factions among the Greeks, the Empirics, from _empeirikos_, meaning experimental--who believed there were no philosophic underlying principles of medical science, and that experience alone was the safe guide,--and the Methodists, from _methodos_, who believed it better to follow the _hodos_, or "middle of the road." The present use of the word empiric shows the contempt with which the former came to be regarded. As cure (_curo_) meant to care for, so did medicus have the same meaning, as already remarked, while the Greek slave, _therapon_, who waited on his master, became later the therapeutist who cared for his ailments. Our word to heal has also a somewhat similar dislocated meaning, since originally it meant protection, i. e., covering. The same root persists in hell, i. e., hades, referring to a certain supposititious locality so well covered that from it there is no escape.