noun🔗Share보행구(of an echinoderm) A row of pores for the protrusion of appendages such as tube feet."The sea star uses its ambulacra, visible as rows of tiny holes along its arms, to extend its tube feet and grip onto rocks. "별불가사리는 팔을 따라 작은 구멍의 열로 보이는 보행구를 사용하여 관족을 뻗어 바위에 붙잡습니다.anatomyanimalbiologyorganismpartChat with AIVocabulary GamePractice Reading