Mucronate: terminated in a sharp point.
Mucrones: in Collembola the two small end pieces of the furcula, proceeding from the dentes.
Mullerian association: a group of species belonging to different genera, often different families or even orders, having similar colors, possessing more or less distasteful qualities and living in the same locality.
Muller's thread: the common terminal thread of all the ovarian tubes.
Multangulate: with many angles.
Multi-: many; used as a prefix, often without the i.
Multiarticulate: with many joints or segments.
Multilocular: with many large cells, spaces or cavities.
Multipartite: divided into many parts.
Multiplicate: with many longitudinal folds or lines of plication.