n. 
齿龙
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oscitron,
oscula,
osculant,
oscular,
osculate,
osculating,
osculating circle,
osculation,
osculatory,
oscule,
相似单词
placoderm,
Placodermi,
placoderms,
placodine,
placodium,
placodont,
placoid,
Placothuriidae,
Placozoa,
placozoan,