second-year student; second-year pupil
Used for a student in the second year of a school or program. Common in educational settings.
He is a second-year high school student.
I studied abroad when I was a second-year student.
Refers to a third-year student or a perennial plant (in botanical context), contrasting with 二年生.
Standard kanji spelling for 'second-year student' and the botanical abbreviation.
Common variant using Arabic numeral; often seen in school contexts.
Compound of 二 (two), 年 (year), and 生 (student/life). The botanical sense is an abbreviation of 二年生植物 (biennial plant).