callosities怎么读？

Photo Gallery: Whales The white bumps on a right whale's head are skin abrasions called callosities.鲸鱼图片 美术馆 .白色的隆起物在一条脊美鲸的头部是皮肤磨损称为老茧皮....

n.无情( callosity的名词复数 )，冷酷，胼胝，硬结...