|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
mnemonic mne·mon·ic (nĭ-mŏn'ĭk)
Relating to, assisting, or intended to assist the memory. n.
A device, such as a formula or rhyme, used as an aid in remembering.
any device for aiding the memory. Named for Mnemosyne, the goddess of memory in Greek mythology, mnemonics are also called memoria technica. The principle is to create in the mind an artificial structure that incorporates unfamiliar ideas or, especially, a series of dissociated ideas that by themselves are difficult to remember. Ideally, the structure is designed so that its parts are mutually suggestive. Grouping items in rhymed verse has long been a popular mnemonic technique, from the "gender rhymes" of the Latin grammars to the verse for remembering the number of days in the months ("Thirty days hath September, April, June and November").
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