胚芽[haiga] germ (of a cereal, e.g. wheat, rice)
胚子[haishi] embryo
胚珠[haishu] ovule
胚胎[haitai] germination
胚乳[hainyuu] albumen (of a seed, esp. the endosperm)

胚葉[haiyou] germ (germinal, embryonic) layers
外胚葉[gaihaiyou] ectoderm
胚性幹細胞[haiseikansaibou] embryonic stem cell
胚性[haisei] embryonic

芽胞[gahou] spore
気胞[kihou] bladder
共産党細胞[kyousantousaibou] communist cell
細胞[saibou] cell (biology)
細胞核[saiboukaku] nucleus (cell, biology)

細胞学[saibougaku] cytology
細胞質[saiboushitsu] cytoplasm
細胞膜[saiboumaku] cellular membrane
小液胞[shouekihou] vesicle
單細胞[tansaibou] single cell