Poll

Boyd’s Bible Dictionary:

(head). The head (Num. 3:47⁴⁷Thou shalt even take five shekels apiece by the poll, after the shekel of the sanctuary shalt thou take them: (the shekel is twenty gerahs:) (Numbers 3:47)). To cut the hair (2 Sam. 14:26²⁶And when he polled his head, (for it was at every year's end that he polled it: because the hair was heavy on him, therefore he polled it:) he weighed the hair of his head at two hundred shekels after the king's weight. (2 Samuel 14:26)).

Concise Bible Dictionary:

The skull or head, but used to express a person (Num. 1:2-22²Take ye the sum of all the congregation of the children of Israel, after their families, by the house of their fathers, with the number of their names, every male by their polls; ³From twenty years old and upward, all that are able to go forth to war in Israel: thou and Aaron shall number them by their armies. ⁴And with you there shall be a man of every tribe; every one head of the house of his fathers. ⁵And these are the names of the men that shall stand with you: of the tribe of Reuben; Elizur the son of Shedeur. ⁶Of Simeon; Shelumiel the son of Zurishaddai. ⁷Of Judah; Nahshon the son of Amminadab. ⁸Of Issachar; Nethaneel the son of Zuar. ⁹Of Zebulun; Eliab the son of Helon. ¹⁰Of the children of Joseph: of Ephraim; Elishama the son of Ammihud: of Manasseh; Gamaliel the son of Pedahzur. ¹¹Of Benjamin; Abidan the son of Gideoni. ¹²Of Dan; Ahiezer the son of Ammishaddai. ¹³Of Asher; Pagiel the son of Ocran. ¹⁴Of Gad; Eliasaph the son of Deuel. ¹⁵Of Naphtali; Ahira the son of Enan. ¹⁶These were the renowned of the congregation, princes of the tribes of their fathers, heads of thousands in Israel. ¹⁷And Moses and Aaron took these men which are expressed by their names: ¹⁸And they assembled all the congregation together on the first day of the second month, and they declared their pedigrees after their families, by the house of their fathers, according to the number of the names, from twenty years old and upward, by their polls. ¹⁹As the Lord commanded Moses, so he numbered them in the wilderness of Sinai. ²⁰And the children of Reuben, Israel's eldest son, by their generations, after their families, by the house of their fathers, according to the number of the names, by their polls, every male from twenty years old and upward, all that were able to go forth to war; ²¹Those that were numbered of them, even of the tribe of Reuben, were forty and six thousand and five hundred. ²²Of the children of Simeon, by their generations, after their families, by the house of their fathers, those that were numbered of them, according to the number of the names, by their polls, every male from twenty years old and upward, all that were able to go forth to war; (Numbers 1:2‑22); Num. 3:47⁴⁷Thou shalt even take five shekels apiece by the poll, after the shekel of the sanctuary shalt thou take them: (the shekel is twenty gerahs:) (Numbers 3:47); 1 Chron. 23:3,24³Now the Levites were numbered from the age of thirty years and upward: and their number by their polls, man by man, was thirty and eight thousand. (1 Chronicles 23:3)
²⁴These were the sons of Levi after the house of their fathers; even the chief of the fathers, as they were counted by number of names by their polls, that did the work for the service of the house of the Lord, from the age of twenty years and upward. (1 Chronicles 23:24)).