More rectilineal is a term used to describe something that is straighter or more angular. Its antonyms, on the other hand, would be words that describe something that is curved or rounded. Examples of antonyms for more rectilineal could be words such as curved, twisted, round, serpentine, or winding. These terms are used to describe objects or lines that are not straight, but rather have curves or bends. It is important to understand the antonyms for words like more rectilineal as they provide context and help to clarify meaning in both written and spoken language.