from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A structure bearing or consisting of a reproductive organ or part, such as a reproductive polyp or bud in a hydroid colony.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An elongated receptacle above the corolla to elevate the stamens and carpels.
- n. A medusoid bud on a hydroid.
from the GNU version of the Collaborative International Dictionary of English
- n. A sexual zooid produced as a medusoid bud upon a hydroid, sometimes becoming a free hydromedusa, sometimes remaining attached. See hydroidea, and Illusts. of athecata, campanularian, and gonosome.
- n. A lengthened receptacle, bearing the stamens and carpels in a conspicuous manner.
from The Century Dictionary and Cyclopedia
- n. In botany, a prolongation of the axis of a flower, bearing the stamens and pistil above the perianth, as in Gynandropsis.
- n. In zoology, one of the generative buds or receptacles of the reproductive elements in the hydrozoans or zoöphytes.
- n. In physiology, any accessory organ of generation which serves to convey or detain the generative products of tho gonads or essential sexual organs of either sex. Oviducts and spermiducts of all kinds, as well as uteri, seminal vesicles, etc., are gonophores.
Sorry, no etymologies found.
Even the degeneration of a medusoid from a free-swimming animal to a mere brood-sac (gonophore) is not sudden and saltatory, but occurs by imperceptible modifications throughout hundreds of years, as we can learn from the numerous stages of the process of degeneration persisting at the same time in different species.