Name:	neural crest
Synonyms:
Definition:	A cell population arising from the dorsolateral aspect of the central nervous system primordium during the segmentation period, and later migrating along stereotyped pathways to give rise to a diverse and well-defined set of cell types including pigment cells, peripheral neurons and glia, and head cartilage.
Ontology:	Anatomy Ontology [ZFA:0000045]

Name:	cell death
Synonyms:	accidental cell death, necrosis
Definition:	Any biological process that results in permanent cessation of all vital functions of a cell. A cell should be considered dead when any one of the following molecular or morphological criteria is met: (1) the cell has lost the integrity of its plasma membrane; (2) the cell, including its nucleus, has undergone complete fragmentation into discrete bodies (frequently referred to as apoptotic bodies). The cell corpse (or its fragments) may be engulfed by an adjacent cell in vivo, but engulfment of whole cells should not be considered a strict criteria to define cell death as, under some circumstances, live engulfed cells can be released from phagosomes (see PMID:18045538).
Ontology:	GO: Biological Process [GO:0008219] QuickGO AmiGO

Name:	increased occurrence
Synonyms:	increased incidence
Definition:	An occurrence which is relatively high.
Ontology:	Phenotypic Quality Ontology [PATO:0002051]