Here 'tis:
The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
recto
SYLLABICATION: rec·to
PRONUNCIATION: rĕk
' tō
NOUN: Inflected forms: pl.
rec·tos
A right-hand page of a book or the front side of a leaf, on the other side of the verso.
ETYMOLOGY: From Latin (foliō) rēctō, (the leaf) being right, ablative of rēctus, straight, right. See reg- in Appendix I.
verso
SYLLABICATION: ver·so
PRONUNCIATION: vûr
' sō
NOUN: Inflected forms: pl.
ver·sos
1. A left-hand page of a book or the reverse side of a leaf, as opposed to the recto. 2. The back of a coin or medal.
ETYMOLOGY: New Latin versō (foliō), (with the page) turned, verso, from Latin versō, ablative of versus, past participle of vertere, to turn. See version.