Definitions

1. verb

to grow in whorls, especially in the formation of a strobilus or spore-bearing organ, as in ferns or conifers

“The ferns strobilar their reproductive structures at the end of the growing season.”

2. noun

a spore-bearing organ, especially one in which the sporophylls are borne in whorls, as in ferns or conifers

“The strobilar of the pine tree produced cones that contained seeds.”