conferruminate

from The Century Dictionary.

• Soldered together; consolidated as if soldered together; specifically, in botany, closely adherent, so as to be separated with difficulty, as the cotyledons of the horse-chestnut.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Bot.) Closely united by the coalescence, or sticking together, of contiguous faces, as in the case of the cotyledons of the live-oak acorn.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb To unite into a solid mass
• adjective botany Closely united by the coalescence of contiguous faces.