Formed by or consisting of curved lines; having the character of a curved line.
A rare variant combining 'curvus' (curved) and 'linea' (line), with the suffix '-ead' suggesting continuity. This appears primarily in obsolete botanical and mathematical texts from the 17th-18th centuries.
This word is so uncommon that most modern dictionaries don't include it, making it a perfect example of how scientific terminology gets replaced by clearer alternatives—'curvilinear' won the battle.
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