一いち塁るい線せんMeaningsNoun1. first-base lineKanji used一one塁base線lineComposed of一いち塁るいfirst base; first baseman; one fortNoun線せんline; stripe; stria; line (e.g. telephone line); wire; ray (e.g. X-ray); beam; line (e.g. of a railroad); track; route; …Noun