Search the dictionary A Chinese word or character, or English Draw a character Search 4 entries. hǎidǐkuòzhāng 海底扩张 seafloor spreading (geology) hǎidǐkuòzhāng 海底擴張 seafloor spreading (geology) hǎidǐkuòzhāngshuō 海底扩张说 theory of seafloor spreading (geology) hǎidǐkuòzhāngshuō 海底擴張說 theory of seafloor spreading (geology)