Name:	proctodeum
Synonyms:	anus
Definition:	An inward fold on the surface of the embryonic ectoderm that develops into part of the anal passage.
Ontology:	Anatomy Ontology [ZFA:0000066]

Name:	iron atom
Synonyms:	26Fe, Eisen, Fe, fer, ferrum, hierro, iron
Definition:	An iron group element atom that has atomic number 26.
Ontology:	ChEBI [CHEBI:18248] ( EBI )