A less preferred term for dipyrrins. (The term 'pyrromethane' has been used for the system with a $\ce{–CH2\bond{–}}$ linkage).
Source: PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1361 [Terms] [Paper]