Term:

Cotyledons foliaceous (= cotyledons leaf-like)
Definition:

Cotyledons that look like leaves but differ in their opposite instead of alternate attachment. Same as cotyledons leaf-like which is the preferred term.
Notes:

In the Lecythidaceae, leaf-like cotyledons are only found in species of Cariniana, Couratari, and Couroupita. Cotyledons leaf-like is preferred over cotyledons foliaceous. See that entry for more information.