Romeric is a duaric orientation, referring to MLW (men loving women). A romeric man may or may not be attracted to other genders as well. It can refer to straight men, bisexual men, pansexual men, and any other men who experience attraction to women.
The term is typically not used as an orientation on it's own, though can be if desired. The term is commonly used by non-straight men to talk about their attraction to women (though straight people are included in the definition). It can also be be used as an identity for men who know they are attracted to women but are unsure if they're attracted to other genders, or by men who are attracted to multiple genders but want to emphasize their attraction to women.
The female equivalent to romeric is julietian.
The term appears to be coined along with the flag on June 27, 2018 with a submission to the Tumblr blog beyond-mogai-pride-flags. The names romeric and julietian were based off Romeo and Juliet.
The meaning of the original romeric flag is unknown.
The second flag was created by reddit user Israbelle on March, 2021. The meaning is unknown. It first appeared to them in a dream during 2020, in which it was drawn in fanart they saw of sonic riding a motorcycle while holding the flag.