mawworm

from The Century Dictionary.

• noun A man who resembles Mawworm, a character in Bickerstaffe's play “The Hypocrite,” 1769; a hypocritical pretender to sanctity.
• noun An intestinal worm which may be found in the stomach, as a pin-worm or threadworm, such as Oxyuris vermicularis.

from the GNU version of the Collaborative International Dictionary of English.

• noun Any intestinal worm found in the stomach, esp. the common round worm (Ascaris lumbricoides), and allied species.
• noun One of the larvæ of botflies of horses; a bot.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Alternative spelling of maw-worm.