nematoden. 線蟲a. 線蟲綱的學術名詞線蟲：生命科學、動物學、食品科技、獸醫學、土壤學、實驗動物及比較醫學線蟲類：動物學英文釋義unsegmented worms with elongated rounded body pointed at both ends; mostly free-living but some are parasitic