10-Letter Words That Start With: SPIR

• parasitic or free-living bacteria; many pathogenic to humans and other animals

• in a spirited or lively manner; with animation and vivacity

• freshwater algae consisting of minute filaments containing spiral chlorophyll bands

• a measuring instrument for measuring the vital capacity of the lungs

• concern with things of the spirit

• a plane curve traced by a point circling about the center but at increasing distances from the center

• a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle

• a continuously accelerating change in the economy

• ornament consisting of a curve on a plane that winds around a center with an increasing distance from the center

• a structure consisting of something wound in a continuous series of loops

• flying downward in a helical path with a large radius

• in the shape of a coil

• to wind or move in a spiral course

• form a spiral

• move in a spiral or zigzag course

• containing or of the nature of alcohol

• lacking ardor or vigor or energy

• evidencing little spirit or courage; overly submissive or compliant