[Count of number of years intervening between the start of the stage and the time of birth according to a reference model. Note that the first year of post-birth development has the value of 0 for this property, and the period during which the child is one year old has the value 1.]
[x starts with y if and only if x has part y and the time point at which x starts is equivalent to the time point at which y starts. Formally: α(y) = α(x) ∧ ω(y) < ω(x), where α is a function that maps a process to a start point, and ω is a function that maps a process to an end point.]
[x surrounded_by y if and only if (1) x is adjacent to y and for every region r that is adjacent to x, r overlaps y (2) the shared boundary between x and y occupies the majority of the outermost boundary of x, x surrounded_by y iff: x is adjacent to y and for every region r adjacent to x, r overlaps y.]
[Relation between an anatomical structure (including cells) and a neuron that chemically synapses to it. , Relation between an anatomical structure and a neuron that chemically synapses to it.]
[ Relation between a neuron and an anatomical structure (including cells) that it chemically synapses to.
, Relation between a neuron and an anatomical structure that it chemically synapses to.]
