| Word | Definitions | Synonyms |
|---|---|---|
| asdic | (noun) a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return | Synonyms: echo sounder, sonar |
| masdevallia | (noun) any of numerous orchids of the genus Masdevallia; tufted evergreen often diminutive plants whose flowers in a remarkable range of colors usually resemble a tricorn with sepals fused at the base to form a tube | - |