IPA: /tɛˈtræmərəs/
KK: /tɛtˈræmərəs/
Describing something that has four similar parts or is arranged in groups of four.
The tetramerous flower has petals that are grouped in sets of four.
Tetramerous → It is formed from "tetra-" (from Greek "tetra", meaning four) and "merous" (from Greek "meros", meaning part). The word "tetramerous" refers to a structure that is composed of four parts.
Think of 'tetra' meaning four, and 'merous' meaning parts — so tetramerous describes something made of four parts.