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Wiktionary (0.00 / 0 votes) Rate this definition: pneumatology (Noun) The study of spiritual beings and phenomena, especially the interactions between humans and God. pneumatology (Noun) The study of the Holy Spirit as revealed in Scripture. Origin: ÏÎ½Îµá¿¦Î¼Î± (pneuma), breath, and -logy.
Gerontology. a division of medicobiological science that studies the phenomena of aging in living organisms, including man. The subdivisions of gerontology are geriatrics (the study of the diseases of the senescent organism), geriatric hygienics (the study of the hygiene of the elderly), and gerontological psychology. The study of gerontology was developed with the essential changes in manâs life expectancy.