[awr-thuh-fawr-mik, awr-thuh-] /ˈɔr θəˈfɔr mɪk, ˌɔr θə-/
a hypothetical acid, HC(OH) 3 , known only in the form of its esters.
[awr-thuh-jen-uh-sis] /ˌɔr θəˈdʒɛn ə sɪs/ noun 1. Biology. 2. Sociology. a hypothetical parallelism between the stages through which every culture necessarily passes, in spite of secondary conditioning factors. /ˌɔːθəʊˈdʒɛnɪsɪs/ noun 1. (biology) 2. the theory that there is a series of stages through which all cultures pass in the same order
[awr-thoh-juh-net-ik] /ˌɔr θoʊ dʒəˈnɛt ɪk/ adjective 1. pertaining to or exhibiting orthogenesis.
[awr-thuh-jen-ik] /ˌɔr θəˈdʒɛn ɪk/ adjective 1. Psychology. of, concerned with, or providing corrective treatment for mentally retarded or seriously disturbed children: orthogenic class. 2. . /ˌɔːθəʊˈdʒɛnɪk/ adjective 1. (med) relating to corrective procedures designed to promote healthy development 2. of or relating to orthogenesis
orthognathia or·tho·gna·thi·a (ôr’thō-nā’thē-ə, -nāth’-, ôr’thŏg-) n. The study of the causes and treatment of conditions related to malposition of the jawbones.