scle·rom·e·ter 
(sklə-rŏmĭ-tər)
(sklə-rŏmĭ-tər)n.
An instrument used to determine the relative hardness of a material by measuring the pressure required to penetrate the material with a standard diamond stylus.
- seclusion
- seclusive
- seclusively
- secobarbital
- second
- second
- Second Advent
- secondarily
- secondariness
- secondary
- secondary accent
- secondary battery
- secondary cell
- secondary color
- secondary consumer
- secondary electron
- secondary emission
- secondary growth
- secondary market
- secondary offering
- secondary school
- secondary sex characteristic
- secondary stress
- secondary structure
- secondary succession