斉次 is read as せいじ (seiji) and means homogeneous.
せいじ
seiji
せいじかんすう
homogeneous function
せいしょう
singing in unison
せいいつせつ
uniformitarianism
せいいつ
uniformity
せいか
governing one's family
せいび
complete equipment
ぜんじ
gradually
ちくじ
successively
だいいちじ
the first ...
だいにじ
the second ...
だいさんじ
the third
きちじ
broadbanded thornyhead (Sebastolobus macrochir)