胚珠 is read as はいしゅ (haishu) and means ovule.
はいしゅ
haishu
じゅず
rosary
たま
ball (i.e. a testicle)
しんじゅ
pearl
じんこうしんじゅ
artificial pearls
じんぞうしんじゅ
しんえんしんじゅ
cultured pearls
もぞうしんじゅ
imitation pearl
れんじゅ
variant of gobang (game)
しゅざん
calculation on an abacus
しゅぎょく
jewel
にっぽんしんじゅゆしゅつくみあい
Japan Pearl Exporters' Association
にっぽんしゅざんれんめい
League of Japan Abacus Associations