Meanings
Cite this entry
APA
penetrograph. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/penetrograph
MLA
“penetrograph.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/penetrograph. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “penetrograph,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/penetrograph.
Source: penetrograph on Wiktionary, CC BY-SA 4.0.