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1. Having or consisting of four similar parts.
2. Having flower parts, such as sepals, petals, and stamens, in sets of four.

te·tram′er·y n.


1. (Biology) (esp of animals or plants) having or consisting of four parts
2. (Botany) (of certain flowers) having parts arranged in whorls of four members
[C19: from New Latin tetramerus, from Greek tetramerēs]
teˈtramerism n


(tɛˈtræm ər əs)

1. consisting of or divided into four parts.
2. (of flowers) having the parts of a whorl arranged in fours or multiples of four.
[1820–30; < New Latin tetramerus < Greek tetramerḗs. See tetra-, -merous]
te•tram′er•ism, n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.tetramerous - having or consisting of four similar parts; tetramerous flowers
biological science, biology - the science that studies living organisms
many-sided, multilateral - having many parts or sides
References in periodicals archive ?
1 a, b), 2-forked dichasia to 1 x 1 cm, axillary to the distal most leaves, flowers with calyx, corolla and androecium pentamerous or tetramerous (Figs.
Corolla merosity: trimerous = 0; tetramerous = 1; pentamerous = 2; hexamerous = 3; octamerous = 4.
1 Leaves vaginate T aphylla 1 Leaves sessile with a narrow base, sometimes slightly auriculate at their lower half but never vaginate 2 Flowers tetramerous T parviflora 2 Flowers pentamerous 3 Staminal filaments arising from the apex of the nectariferous disc lobes T gallica 3 Staminal filaments arising between the nectariferous disc lobes 4 Inflorescences with both solitary and fasciculate racemes (groups from 2 to 4) T hohenackeri 4 Inflorescences with racemes always solitary 5 Racemes 5-7 mm wide.
Inflorescence are polygamous, tetramerous consisting of male and hermaphrodite flowers.