词根词缀：dactylo-, dactyl-, dactylio-, -dactyl, -dactyla, -dactylia, -dactylic, -dactylism, -dactyloid, -dactylous, -dactyly

【来源及含义】Greek: finger, toe

【相关词根词缀】 Cross references directly, or indirectly, involving the "toes" and "fingers": digit-; hallu-; phalang-.

【同源单词】acrocephalopolysyndactyly, acrocephalosyndactylia, acrocephalosyndactyly, adactyl, adactylia, adactylism

词根词缀：tetra-, tetr-

【来源及含义】Greek: four; a number used as a prefix

【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "four, fourth": quadri-; quatr-; tessara-.

【同源单词】rotundo-tetragonal, tessaraglot, tetrabasic, tetrablastic, tetrabrach, tetrabrachius