thou·sandth 
(thouzəndth, -zənth)
(thouzəndth, -zənth)n.
1. The ordinal number matching the number 1,000 in a series.
2. One of 1,000 equal parts.
thousandth adv. & adj.
- articulate
- articulately
- articulateness
- articulation
- articulative
- articulator
- articulatory
- Artie
- artifact
- artifactual
- artifice
- artificer
- artificial
- artificial chromosome
- artificial horizon
- artificial insemination
- artificial intelligence
- artificiality
- artificial language
- artificial life
- artificially
- artificial respiration
- artificial selection
- artillerist
- artillery