noun. A coherent mass of pollen grains typically transferred as a unit during pollination, found in the flowers of certain plants such as orchids and milkweeds.

noun. In botany, an agglutinated mass or body of pollengrains, composed of all the grains of an anthercell.

noun. A coherent mass of pollen, as in the milkweed and most orchids.

noun. A coherent mass of pollen, as in the milkweed and most orchids, which is dispersed as a single unit during pollination.

noun. a coherent mass of pollen grains (as in orchids)

"The pollen spores are usually aggregated into two or four waxy masses ( "pollinia," sing. pollinium), which usually can only be removed by the agency of insects upon which all but a very few orchids are absolutely dependent for the pollination of the flowers."

pollinarium  

pollinial  polliniate  

pollen  

polyad  

pollinia