a. Bot. [f. CACT-US + -OID.] Resembling the cactus in form or structure.
1878. Hooker & Ball, Marocco, 328. The curious cactoid Euphorbia, producing the Gum Euphorbium.
1885. J. Ball, in Jrnl. Linn. Soc., XXII. 3. Cactoid plants … are seen on the rocky slopes.
