Rūpakaṇḍa

Abhidhammapiṭaka · Dhammasaṅgaṇī · Vol. 34 · Section 502

[502] Therein, which is all form (rūpa)? The four great essentials (mahābhūta) and the form derived from the four great essentials — this is called all form. Mātikā (Matrix) The Matrix of Monads (Ekaka-mātikā)

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.