亜種[ashu] subspecies
異機種[ikishu] heterogenous equipment
異種[ishu] different kind (species, variety)
育種[ikushu] (plant) breeding
育種家[ikushuka] (plant) breeder

育種所[ikushujo] (plant) nursery
一種[isshu] species
一粒種[hitotsubudane] an only child
種違い[tanechigai] half-brother
艶種[tsuyadane] love affair

アルファ線[arufasen] alpha rays
エックス線[ekkususen] X-ray
サイン曲線[sainkyokusen] sinusoid
スピード線[supiidosen] speed lines
緯線[isen] parallel

一次線輪[ichijisenrin] primary coil
一線[issen] line
一直線[icchokusen] straight line
一番線[ichibansen] track no. 1
一塁線[ichiruisen] first-base line

此の辺[konohen] this area
の辺に[noatarini] on the shores of
磯辺[isobe] seashore
一辺倒[ippentou] complete devotion to one side
右辺[uhen] right side

浦辺[urabe] seacoast
海辺[umibe] beach
岸辺[kishibe] shore
近辺[kinpen] neighbourhood
五辺形[gohenkei] pentagon