archenteron /ärk-enˈtə-ron/ (zoology)

In the developing embryo, the primitive gut

• asana
• asanas
• as and when
• Asante
• Asantes
• asap
• ASAP
• asarabacca
• asarabaccas
• as a rule
• asarum
• asarums
• as a whole
• ASB
• asbestic
• asbestiform
• asbestine
• as best one can
• asbestos
• asbestos cement
• asbestoses
• asbestosis
• asbestous
• ASBM
• aphis