n. plSyngenesia(Bot) A Linnæan class of plants in which the stamens are united by the anthers.
Century Dictionary and Cyclopedia
syngenesiaThe nineteenth class of plants in the sexual system of Linnæus, the Compositæ of the natural system, the name alluding to their united anthers, which thence are now called syngenesious. There are, according to him, 6 orders, namely Polygamia æqualia, Polygamia superflua, Polygamia frustranea, Polygamia necessaria, Polygamia segregata, and Monogamia. The thistle, tansy, daisy, southernwood, sunflower, and marigold are examples. See Compositæ, and cut under stamen.
Webster's Revised Unabridged Dictionary
NL., fr. Gr. sy`n with, together + generation, birth