Sentence:  Our wedding-cake is the memorial of a practice, that bore a striking resemblance to, if it was not derived from, "confarreatio", the form of marriage that had fallen into general disuse amongst the Romans in the time of Tiberius. Taking its name from the cake of <WSD>far</WSD> and mola salsa that was broken over the bride's head, "confarreatio" was attended with an incident that increases its resemblance to the way in which our ancestors used at their weddings objects symbolical of natural plentifulness. 
Meaning of the word marked with <WSD> tags:  Spelt (a type of wheat, "Triticum spelta"), especially in the context of Roman use of it.