Where does “acrocranic” come from?

acrocranic (English) comes from English acro, from English acrobatic, from English -ic, from English image, from French image, from Portuguese imagem, from Spanish imagen, from Italian immagine — in.

Ancestry of “acrocranic”, step by step

acrocranic traces back through two separate lines of ancestry.

via English acro

StepLanguageWordMeaning
1Englishacroof or pertaining to something that combines...
2EnglishacrobaticOf or pertaining to an acrobat; vigorously active
3English-icUsed to form adjectives from nouns with the...
4EnglishimageAn optical or other representation of a real...
5Frenchimagepicture, image; frame; first-person singular...
6Portugueseimagemimage; picture; figure; image; image; face
7Spanishimagenimage
8Italianimmagineimage; imago
9Latinimāginem
10Latinim-Alternative form of in-; form of "in"; in
11Latinīn-un-, non-, not
12Latinînin, at, on, upon, from (space)
13Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
14Proto-Italicenin
15Proto-Indo-Europeanh₁énin

via English cranic

StepLanguageWordMeaning
1EnglishcranicSynonym of cranial
2Latinchronicanominative plural of chronicon; accusative plural...
3Ancient Greekχρονικόςof or concerning time, temporal; chronological
4Ancient GreekΧρόνοςtime (in the abstract sense)
Every word from Proto-Indo-European h₁én