词根词缀：meso-, mes-, mesi-

【来源及含义】Greek: middle, intermediate; close to a center line; between

【同源单词】brachymesophalangia, circumesophagal, dolichoeuromesocephalus, mesencephalic, mesencephalon, mesencephalotomy

词根词缀：psammo-, psamm-, psamme-

【来源及含义】Greek: sand

【同源单词】clepsammia, endopsammon, epipsammic, epipsammon, mesopsammon, pelopsammic