american larch: medium-sized larch of Canada and northern United States including Alaska having a broad conic crown and rust-brown scaly bark
larch: any of numerous conifers of the genus Larix all having deciduous needlelike leaves
chronic pyelonephritis: pyelonephritis that develops slowly and can lead to renal failure if untreated; often associated with a kidney stone or with narrowing of the urinary passageways