This is the 16511th most frequent Russian word.
сантиметра
"Сантиметра" means "centimeter" in English.
Here, "сантиметра" is used in the genitive plural case to express a quantity.
Я подвинул стол на два сантиметра.
I have moved the table by two centimeters.
In this sentence, "сантиметров" is in the plural nominative form to indicate the measurement unit.
Длина карандаша составляет около тридцати сантиметров.
The length of the pencil is about thirty centimeters.
Here, "сантиметра" is used in the singular genitive case to express lack or absence.