Roy G Biv is a name used to remember the order of colors in a light spectrum:
Red
Orange
Yellow
Green
Blue
Indigo
Violet
Rhymes are one example of mnemonic devices. Other examples include music mnemonics, name mnemonics, word or expression mnemonics, and model mnemonics.
A name mnemonic
A mnemonic is a shorthand concept to aid recall of a longer one, for example, the acronym HOMES to remember the names of the Great Lakes (Huron, Ontario, Michigan, Eire, Superior). Do you want to remember the word "fate"? It seems to be about as short as it can get already. Now FATE could be a mnemonic for something else.
To remember the color of the rainbow, think of the farmer telling his son Roy to bring in their cow named Violet. "Roy, go bring in Violet." Red Orange Yellow, Green, Blue, Indigo, Violet.
"Little animals never go up against great elephants"
A mnemonic is typically used to remember long concepts and terms, not one word.
mnemonic
swron
an expression of great or excessive emotion or enthusiasm
mnemonic wha....?
ladies afford nice dog
The mnemonic I use to remember what happened to each of Henry VIII's wives is: Divorced, beheaded, died; divorced, beheaded, survived. I use mnemonics to remember stuff.