柯林斯詞典efficacious /??f??ke???s/ 1. ADJ Something that is efficacious is effective. 有效的[正式] The nasal spray was new on the market and highly efficacious. 這種鼻腔噴霧劑是市場(chǎng)新品，非常有效。 返回 efficacious劍橋詞典able to produce the intended result 靈驗(yàn)的；奏效的；有效的 同義詞effective (SUCCESSFUL) 返回 efficacious