Wiki: An interpunct( · ), also called an interpoint,^[1] is apunctuation mark consisting of a dot used for interword separation in ancient Latinscript and in some modern languages as a stand-alone sign inside a word.

We use it in math expression, a lot. However, I didn’t know that the Lencet journals use it, too, as the decimal point! (Luckily, I had a small voice telling me to play safe, or I would have lowered these darn points one by one!)

Formatting of text (for Lencet)

• Type a single space at the end of each sentence

• Do not use bold face for emphasis within text

• We use a comma before the final "and" or "or" in a list of     items

• Type decimal points midline     (ie, 23·4, not 23.4). To create a midline decimal on a PC: hold     down ALT key and type 0183 on the number pad, or on a Mac: ALT shift 9

• Numbers    one to ten are written out in words unless they are used as a unit of     measurement, except in figures and tables

• Use single    hard-returns to separate paragraphs. Do not use tabs or indents to start a     paragraph

• Do not use    the automated features of your software, such as hyphenation, endnotes,     headers, or footers (especially for references). Please use page numbering