- Orthohydrogen Subst. Adj.
- Orthokeratinization Subst.
- Orthokeratology Subst. Adj.
- Orthokeratosis Subst.
- Ortholattice Subst. Adj.
- Orthology Subst. Adj.
- Orthometer Subst. Adj.
- Orthomyxovirus Subst. Adj.
- Orthonormality Subst. Adj.
- Orthonormalization Subst.
- Orthopaedics Subst.
- Orthopaedist Subst.
- Orthopantomogram Subst. Adj.
- Orthopantomograph Subst. Adj.
- Orthopantomography Subst. Adj.
- Orthopedic Adj. Subst.
- Orthopedics Subst.
- Orthopedist Subst.
- Orthophony Subst.
- Orthophoria Subst.
- Orthophosphoric Adj. Subst.
- Orthophotograph Subst. Adj. Verb
- Orthophotomap Subst. Adj.
- Orthophyre Subst.
- Orthopnea Subst.
- Orthopnoea Subst.
- Orthopolar Adj. Subst.
- Orthopole Subst. Adj.
- Orthopositronium Subst.
- Orthopoxvirus Subst. Adj.
- Orthopraxia Subst.
- Orthopraxy Subst.
- Orthoprojector Subst. Adj.
- Orthopsychiatrist Subst.
- Orthopsychiatry Subst.
- Orthopter Subst.
- Orthopteran Subst. Adj.
- Orthoptics Subst.
- Orthoptist Subst. Adj.
- Orthopyroxen Subst.
- Orthopyroxene Subst. Adj.
- Orthoroentgenography Subst.
- Orthoroentgenometry Subst.
- Orthoscanner Subst.
- Orthoscheme Subst. Adj.
- Orthoscope Subst.
- Orthosilicate Subst. Adj.
- Orthosis Subst.
- Orthoskiagraphy Subst.
- Orthostatometer Subst. Adj.
- Orthostereoscope Subst.
- Orthostichy Subst.
- Orthotic Adj. Subst.
- Orthotics Subst. Adj.
- Orthotist Subst. Adj.
- Orthotoluidine Subst. Adj.
- Orthotopy Subst.
- Orthotropism Subst.
- Orthotropy Subst.
- Ortolan Subst. Adj.