Wiktionary
n. 1 A word, phrase or longer text in which the typeface or the layout has some special significance 2 A signature made from interwoven Arabic words, or interwoven Arabic words in the shape of the thing described
Wikipedia
A calligram is a poem, phrase, or word in which the typeface, calligraphy or handwriting is arranged in a way that creates a visual image. The image created by the words expresses visually what the word, or words, say. In a poem, it manifests visually the theme presented by the text of the poem. Guillaume Apollinaire was a famous calligram writer and author of a book of poems called Calligrammes. His poem written in the form of the Eiffel Tower is an example of a calligram.
Usage examples of "calligram".
The boy is wearing a white T-shirt with a yellow calligram on the chest surrounded by a circle of yellow light, rainbow-colored at the edges.
The banner is the calligram in the rainbow circle stirring gently in a wind that ruffles his shorts around smooth white thighs.
Next to them was a display case with crucifixes and calligrams and chalices made of gold and silver.