diff --git a/r/R/dictionary.R b/r/R/dictionary.R
index 053fa43f3dd4e..6273ffc2c87dd 100644
--- a/r/R/dictionary.R
+++ b/r/R/dictionary.R
@@ -53,7 +53,7 @@ DictionaryType$create <- function(index_type = int32(),
 
 #' Create a dictionary type
 #'
-#' @param index_type A DataType for the indexes (default [int32()])
+#' @param index_type A DataType for the indices (default [int32()])
 #' @param value_type A DataType for the values (default [utf8()])
 #' @param ordered Is this an ordered dictionary (default `FALSE`)?
 #'
diff --git a/r/man/dictionary.Rd b/r/man/dictionary.Rd
index 17629e0f993cc..2716a173c7882 100644
--- a/r/man/dictionary.Rd
+++ b/r/man/dictionary.Rd
@@ -8,7 +8,7 @@ dictionary(index_type = int32(), value_type = utf8(),
   ordered = FALSE)
 }
 \arguments{
-\item{index_type}{A DataType for the indexes (default \code{\link[=int32]{int32()}})}
+\item{index_type}{A DataType for the indices (default \code{\link[=int32]{int32()}})}
 
 \item{value_type}{A DataType for the values (default \code{\link[=utf8]{utf8()}})}