Definition: a term used in the sense of elision or lopa in the case of the affix शप् when it is elided after the roots headed by हु, i. e. roots of the third conjugation as also after any root wherever it is so seen in the Vedic Literature: cf. बहुलं छन्दसि P. III. 4. 76. This श्लु is looked upon as a substitute zero, or nil for the general vikarana शप् in the case of these roots; cf. जुहोत्यादिभ्यः श्लुः P. II. 4. 75. The specific feature of this elision of the vikarana शप् by means of the term श्लु, is that it causes reduplication of the roots to which it is added; cf. लुकि प्रकृते श्लुविधानं द्विर्वचनार्थम् Kas, on. P. II. 4. 75 and P. III. 1. 10.