Resolution 12 of the 11th Conférence Générale des Poids et Mesures (CGPM) adopted 12 SI prefixes in 1960, including pico- and nano-. Google Ngrams show steep decline in the use of millimicro- after 1964, and micromicro- after 1966. Some other double prefixes, like kilomega- and hectokilo- were also in use, decimilli- was even standardized in Frace until 1961....
According to "The Philosophical Breakfast club", https://library.si.edu/digital-library/book/philosophicalbr00snyd, by Laura J. Snyder, William Whewell first coined the term "scientist" in 1833 at a meeting of the British Association for the Advancement of Science:
"...If "philosophers" was taken to be "too wide and lofty" a term, then "by analogy with ...
I looked in the Oxford English Dictionary (subscription required) for English usages.
physics used in the medical sense, I do not report on.
physics used for "natural science" in general: The oldest instance they have is from 1487.
J. Skelton tr. Diodorus Siculus Bibliotheca Historica iii. 174 Among the Grekes, as it is many tymes seen, it is ...
Some references :
consider that Lord Kelvin published is well-known textbook in 1867 with the title Treatise on Natural Philosophy.
J.C.Maxwell begins his Matter and Motion (1876) with "Physical Science…".
In K.Pearson's The Grammar of Science (1892), the terms : physics and science/scientist, are definitely there.