Wikipedia:

Laxative | Laxatives | purgatives | aperients

Summary:

foods, compounds, or drugs taken to induce bowel movements or to loosen the stool, most often taken to treat constipation. Certain stimulant, lubricant, and saline laxatives are used to evacuate the colon for rectal and bowel examinations, and may be ...  (40 of 2306 words)

Link:

http://en.wikipedia.org/wiki/Laxative  [cite]

Columbia:

laxative | cathartic

Summary:

drug or other substance used to stimulate the action of the intestines in eliminating waste from the body. The term laxative usually refers to a ...  (25 of 297 words)

Link:

http://www.infoplease.com/ce6/sci/A0829117.html  [cite]

Encarta:

physic | physics [plural] | physicked [past tense] | physicking [present participle]

Summary:

something that lifts the spirits or energizes | [archaic] medicine or healing as an art or profession | [archaic] a medicine, especially a purgative | ...  (22 of 88 words, 4 senses, 1 etymology, pronunciation)

Link:

http://encarta.msn.com/dictionary 1861725906/definition.html  [cite]

Merriam-Webster:

physic

Summary:

the art or practice of healing disease | the practice or profession of medicine | a medicinal agent or preparation | "purgative" | archaic; "natural ...  (21 of 70 words, 5 senses, 1 etymology, pronunciation)

Link:

http://www.merriam-webster.com/dictionary/physic  [cite]

Random House:

physic | physicked [past tense] | physicking [present participle]

Summary:

a medicine that purges; cathartic; laxative. | any medicine; a drug or medicament. | [archaic] the medical art or profession. | [obsolete] See ...  (20 of 57 words, 6 senses, pronunciation)

Link:

http://dictionary.infoplease.com/physic  [cite]

Wiktionary:

physic | physicked [past tense] | physicking [present participle] | physics [3rd-person singular present] | physician

Summary:

[countable noun] A medicine or drug, especially a cathartic or purgative. | [uncountable] The art or profession of healing disease; medicine. | [transitive verb] To cure or heal; to treat or administer medicine, especially to purge.  (34 of 37 words, 3 senses)

Link:

http://en.wiktionary.org/wiki/physic  [cite]