Lammas noun. ['lamǝs]
[Old English hlāfmæsse, from hlāf LOAF noun¹ + mæsse MASS noun¹; later interpreted as from LAMB noun + MASS noun¹.]
1 August, spec. as (a) celebrated in the early English Church as a harvest festival, at which loaves of bread made from the first ripe corn were consecrated, (b) observed in Scotland as one of the quarter days; also Lammas day. Also (arch.), the part of the year in which Lammas occurs.
latter Lammas: see LATTER adjective.

Comb.:
Lammas day: see above; Lammas growth Forestry a shoot produced by a tree in summer, after a pause in growth; Lammas-land Hist. private land available for common use after Lammas until the following spring; Lammas shoot = Lammas growth above; Lammas wheat winter wheat.

[TahlilGaran] English Dictionary ▲