| ACETOMETER | • acetometer n. Alternative form of acetimeter. • ACETOMETER n. a device for measuring the concentration of acetic acid in a solution, esp. in vinegar. |
| ATTOMETERS | • attometers n. Plural of attometer. • ATTOMETER n. ten to the power of minus eighteen metres, also ATTOMETRE. |
| AUTOMETERS | • AUTOMETER n. a small device fitted into a photocopier to count the number of copies made. |
| CYTOMETERS | • cytometers n. Plural of cytometer. • CYTOMETER n. an instrument for counting cells. |
| HECTOMETER | • hectometer n. US spelling of hectometre. • HECTOMETER n. a measure of length, equal to a hundred meters, also HECTOMETRE. |
| HYETOMETER | • hyetometer n. Rain gauge. • HYETOMETER n. an instrument for measuring rainfall. |
| LACTOMETER | • lactometer n. A device that estimates the cream content of milk by measuring its specific gravity. • LACTOMETER n. an instrument for testing the relative density of milk. |
| OPTOMETERS | • optometers n. Plural of optometer. • OPTOMETER n. an instrument for testing vision. |
| PHOTOMETER | • photometer n. (Physics) Any of several instruments used to measure various aspects of the intensity of light. • photometer v. (Astronomy) To measure some aspect of light (from a star) using a photometer. • PHOTOMETER n. an instrument for measuring light intensity. |
| POTOMETERS | • potometers n. Plural of potometer. • POTOMETER n. an instrument measuring the rate at which plants absorb water. |
| SCOTOMETER | • scotometer n. An instrument for detecting and measuring scotomas. • SCOTOMETER n. an instrument for detecting defects in the visual field. |
| TINTOMETER | • tintometer n. Synonym of colorimeter. • TINTOMETER n. another name for colorimeter, an instrument for measuring and determining color. |