A rictameter is an interesting, and visually beautiful type of poem. When centered, it looks much like a diamond. It is similar in idea to a haiku as far as the spirit of the poem, but seems to be an evolution of a cinquain.
To form a rictameter, you start with a line of two syllables, then consecutively increase each syllable number in the next lines by two, until you reach ten syllables in the fifth line. Then, you start decreasing by two syllables, until you reach the same two syllable line you started with.
The syllables would look something like this per line: 2,4,6,8,10,8,6,4,2.
If you wish to experiment with a rictameter, there are a number of ways to do so, one of which, the simplest, is to not use the same 2 syllable word from line one in line nine. There are also "double rictameters" which is basically one poem, of two rictameters in a row, which again is very visually expressive. There is also the inverted rictameter, in which you start with a ten syllable line, go down to a