Sentence:  There are four terms in the year, viz. ... 3. <WSD>Easter term</WSD>, which begins on the tenth day after Easter Sunday, and ends on the day before Whitsunday. 
Meaning of the word marked with <WSD> tags:  The summer term of the (University of Cambridge), and other educational institutions, running from April to June. The term was modelled after the legal term, but does not begin and end on the same dates.