From some reading I did as a newcomer, I understand that the term iptables isn't really that straight forward as it sounds ("a list of ip addresses"), and may resemble at least 3 different things in the Linux discourse:
The iptables Linux kernel module made of an information system in the form of context-based tables which acts as logical basis for another Linux kernel module - The Linux firewall.
A Linux utility also called iptables that comes virtually in any distro, and uses a sysadmin to manipulate the kernel module called iptables (section 1) by commands, "from outside" (instead by text editing, "from inside").
A potential set of tables (or a single table) inside the iptables kernel module, dealing with allowed or blocked IP addresses.
I am new to Linux and can't tell how exactly was I accurate here; My question is if this is accurate and if there aren't any more "semantic" names for these types of software.
Edit: It was also unclear to me if it is right to explain "iptables chain" just a "special type of rules" or as "a particular iptables command dealing with all cells in a row". I did saw we can change a row in a "chained" command, like
iptables [-arguments] [value per column].