explanandumn.

1892 Academy 6 Aug. 114/2 Whenever a psychical explanandum is run to earth in some feature of nerve structure or function, the pursuit is over.

1948 C. G. Hempel & P. Oppenheim in Philos. of Sci. 15 136 We divide an explanation into two major constituents, the explanandum and the explanans.

1962 L. J. Cohen Diversity of Meaning iv. 133 An explanation of naming that is futile and circular because the explanans cannot be conceived except through the explanandum.

1970 M. Hesse in R. G. Colodny Nature & Function Sci. Theories 71 Explanations are supposed to refer to entities different from those referred to in the explananda.

2007 Times Higher Educ. Suppl. (Nexis) 8 June 23 The relationship of myth to abstract thinking is not a Hellenic given but a cross-cultural explanandum.