Looking on the internet deeply has found these results:

an eccentric is the most popular phrase on the web.

eccentrically 1119,000 results on the web	an eccentric 1443,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Adverb. (comparative more eccentrically, superlative most eccentrically). In an eccentric manner. Origin. eccentric +‎ Derived Forms. eccentrically, adverb. Word Origin. C16: from Medieval Latin eccentricus, from Greek ekkentros out of centre, from ek not symmetrically with respect to the center. Based on WordNet 3.0, Farlex clipart ... Adv. 1. eccentrically ally. English Wiktionary. Available under ... ex in an eccentric or bizarre manner. 2. eccentrically 1 + kentron centre.	b : deviating from conventional or accepted usage or conduct especially in odd or whimsical ways <an eccentric millionaire>. 2. a : deviating from a circular path; ... §Comparison to considerations of normality[edit]. A person who is simply in a " fish out of water" situation is not, by the strictest definition, an eccentric since, ... deviating from the recognized or customary character, practice, etc.; irregular; erratic; peculiar; odd: eccentric conduct; an eccentric person. 2. Geometry. not ... Synonyms for eccentric at Thesaurus.com with free online thesaurus, antonyms, and definitions. Dictionary and Word of the Day.

eccentrically

1119,000 results on the web

an eccentric

1443,000 results on the web

More popular!

Adverb. (comparative more eccentrically, superlative most eccentrically). In an eccentric manner. Origin. eccentric +‎
Derived Forms. eccentrically, adverb. Word Origin. C16: from Medieval Latin eccentricus, from Greek ekkentros out of centre, from ek
not symmetrically with respect to the center. Based on WordNet 3.0, Farlex clipart ...
Adv. 1. eccentrically
ally. English Wiktionary. Available under ...
ex
in an eccentric or bizarre manner. 2. eccentrically
1 + kentron centre.

b : deviating from conventional or accepted usage or conduct especially in odd or whimsical ways <an eccentric millionaire>. 2. a : deviating from a circular path; ...
§Comparison to considerations of normality[edit]. A person who is simply in a " fish out of water" situation is not, by the strictest definition, an eccentric since, ...
deviating from the recognized or customary character, practice, etc.; irregular; erratic; peculiar; odd: eccentric conduct; an eccentric person. 2. Geometry. not ...
Synonyms for eccentric at Thesaurus.com with free online thesaurus, antonyms, and definitions. Dictionary and Word of the Day.