-merous
the ending of the adjs. dimerous, trimerous, tetramerous, pentamerous, etc., used Bot. in the sense of ‘having (a specified number of) parts’. The numeral part of these words is often expressed in writing by an arabic figure, which is sometimes replaced by the English numeral word, as in 2-merous, five-merous.
| 1870 Hooker Stud. Flora p. x, Papaveraceæ. Flowers regular 2-merous. 1888 Athenæum 18 Aug. 228/2 A corolla of four petals could not have been provided with the same amount of nutritive material as a five-merous one. |