blackthorn; sloe
Refers to the plant Prunus spinosa or its fruit; a botanical term used in gardening and cooking contexts.
The fruit of the blackthorn is used to make sloe gin.
From the genus name Spinoza (or spinosa) combined with スモモ (plum). The exact derivation of 'スピノサ' is uncertain; it may be a phonetic adaptation of the Latin 'spinosa'.