noun
small political party
Refers to a political party with relatively few members or limited influence, often contrasted with major parties.
小政党が連立政権に参加した。
A small political party joined the coalition government.
選挙では小政党も独自の候補者を立てた。
In the election, small political parties also fielded their own candidates.
大政党 means 'major political party', the opposite of 小政党.
Compound of 小 (small) + 政党 (political party). A straightforward modern term with no obscure historical derivation.