tran·sect 
(trăn-sĕkt)
(trăn-sĕkt)tr.v. tran·sect·ed, tran·sect·ing, tran·sects
To divide by cutting transversely.
n.
A usually straight line along which measurements or observations are made at regular intervals, as for purposes of ecological study.
[TRANS- + -SECT.]
tran·section n.